The UK’s climate saw a record-breaking 2025, with the year being both the warmest and sunniest seen since observations began.
The year 2025 has joined 2024, 2023, 2022 and 2014 in the UK’s top-five warmest years.
In this review, we take a look back at the UK’s climate in 2025 and place the record-breaking year in the context of human-caused climate change. We find:
- It was the warmest and sunniest year on record. January and September were the only months that were cooler than average.
- A Met Office attribution study estimates that 2025’s average temperature would have been exceptionally unlikely in pre-industrial times – but could now occur, on average, every three years.
- Spring was the warmest on record, breaking a record set in 2024.
- Spring was not only the sunniest on record, but the fourth-sunniest season ever recorded, after the summers of 1976, 1996 and 1911.
- It was the warmest summer on record. The summer temperature record was made around 70 times more likely due to human-induced climate change.
- The persistent high-pressure systems in spring and summer, which contributed to the warm and sunny conditions, also resulted in an extended dry spell – including the driest spring since 1974.
- Wetter conditions at the end of the year alleviated some of the rain shortfall. The year concluded with 90% of average annual rainfall.
- Storm Éowyn in late January was the most powerful wind storm in over a decade and the most severe storm in Northern Ireland since 1998.
- Storm Floris in early August was not unprecedented for a storm, but was one of the most severe wind storms to affect Scotland during the summer.
- Storm Amy in early October hit north-western parts of the UK, with heavy rain falling widely, resulting in the wettest day of the year for the UK overall.
(See our previous annual analysis for 2024, 2023, 2022, 2021, 2020, 2019 and 2018.)
The year in summary
The Met Office relies on the long-running HadUK-Grid dataset to place recent UK weather and climate into its historical context. The gridded, geographically complete dataset combines observational data for monthly temperature since 1884, rainfall since 1836 and sunshine since 1910.
Unless stated otherwise, the rankings of events and statements (such as “warmest on record”) in this article relate to the HadUK-Grid series.
The “climate anomaly” maps below show the difference between the average temperature (left), rainfall total (middle) and sunshine duration (right) between 2025 and the 1991-2020 period. In other words, they show how much warmer, cooler, wetter, drier, sunnier or cloudier the year was than average for each county of the UK.
The maps show that the whole country was warmer than average, with central and north-east England, parts of Northern Ireland and the tip of north-west Scotland, Orkney and Shetland seeing the greatest change.
The UK overall had 90% of average rainfall. The driest regions relative to average were around Essex, Moray and Aberdeenshire, which received less than 75% of normal annual rainfall.
In contrast, some western counties were slightly wetter than average – including Cornwall (110%) and Cumbria (107%).
Sunshine was above average across the UK, with eastern England and north Scotland exceeding 120% of the average.
Attribution
The UK’s absolute temperature averaged at 10.09C in 2025. This follows 2022 (at 10.03C) as the second time that the annual average temperature has exceeded 10C.
In our analysis of the UK’s climate in 2022 for Carbon Brief, we reported on a Met Office attribution study that found that human-caused climate change had increased the likelihood of UK annual absolute temperature averaging above 10C by a factor 160.
That study concluded that exceeding 10C – while unprecedented in the historical observational record – would become increasingly common and would likely occur every three-to-four years.
Three years on from that analysis and the 10C threshold has been breached for a second time – and an updated attribution analysis has been produced exploring the likelihood of a return of temperatures above the 10.09C recorded in 2025.
The study, which uses the same methodology as the 2022 paper, finds that UK annual mean temperatures above 10.09C are estimated to occur approximately every three years in the current climate. In contrast, they would have occurred around every 780 years in pre-industrial times.
Human-caused climate change has, therefore, increased the probability of average temperatures in excess of 10.09C by a factor of 260.
These results show that 2025’s record-breaking annual temperature – while unprecedented in the historical observational record – should be considered fairly normal in the current climate.
Climate projections indicate that, by the later part of the 21st century, a year like 2025 could be a relatively cool year.
The figure below compares observations of UK annual average temperatures (black line) – relative to the long-term average – to climate model simulations that include (red/purple) or exclude (green) human-caused emissions of greenhouse gases and land-use change.
The green and red curves start to diverge from around the 1980s, suggesting that human influence is indeed the dominant factor in the warming trend. The shaded range of the simulations show that in our current and future climate, much warmer years than 2025 are plausible.
Colder years are also still possible, but it is much less likely that we would experience a cold year like 2010 – and exceptionally unlikely for a year to be in the top-10 coldest years for the UK. The most recent year to feature in the top-10 coldest years was 1963.
Warmer, wetter, sunnier
Four of the UK’s last five years all appear in the top-five warmest years since 1884.
The Central England Temperature (CET) series is the longest continuous instrumental climate record in the world, dating back to 1659. Covering a region roughly enclosed by Lancashire, London and Bristol, it does not represent the whole of the UK. However, when averaged across a year and analysed across centuries, it does provide a multi-century perspective that is representative of climate variations and changes that impacted the UK.
As with the HadUK-Grid temperature record, the CET series also identifies 2025 as the warmest year on record. The longer-running temperature series identifies the same five years – in the same order – as the warmest on record. This is shown in the table below.
| Year | UK (from HadUK-Grid) | Central England Temperature |
|---|---|---|
| 2025 | 10.09C | 11.23C |
| 2022 | 10.03C | 11.18C |
| 2023 | 9.97C | 11.13C |
| 2014 | 9.88C | 11.04C |
| 2024 | 9.79C | 10.96C |
The graph below of the CET series shows that temperatures recorded in recent years are well outside the range of variability recorded over more than 300 years.
However, the UK is not only warming, it is also getting wetter and sunnier. The year 2025 was relatively dry, recording 90% of average rainfall. This made it the driest year recorded since 2010 and put it in contrast to relatively wet years in 2023 and 2024.
The longer-term trend can be seen in the figure below, which shows that 2025 was relatively dry compared to recent decades, but not exceptional in the longer-term historical context.
The last time the UK had a year in the top-10 driest was in 1955, whereas all five of the top-10 wettest years have occurred this millennium. The wettest year on record still stands as 1872.
The drivers of annual rainfall trends are more complex than for temperature.
A significant factor in rainfall trends is a warming atmosphere’s ability to hold more moisture. However, this does not completely account for recent increases in rainfall.
Large-scale atmospheric circulation patterns – particularly features such as the jet stream and associated storm tracks across the North Atlantic – also play a crucial role. These are influenced by annual and decadal fluctuations in the Earth’s climate, as well as human-caused climate change.
UK annual sunshine totals have also been rising since the 1980s, with 2025 setting a record by a considerable margin. This is in sharp contrast to 2024, which was the dullest year since 1998. This is shown in the graph below, where the dotted line shows the underlying long-term trend, with year-to-year variations removed.
The cause of the sunshine trend is also uncertain, with both natural climate variability and human activity (through reduced regional air pollution caused by a reduction in aerosol emissions) potential contributors. Climate projections do not provide any strong evidence for how sunshine trends might develop.
The year in storms
The Met Office has been naming storms since 2015. Each storm-naming period runs from September to August.
(For more on storm naming in the UK, read Carbon Brief’s explainer.)
The criteria for storm naming has changed over time. It accounts for meteorological conditions, as well as the potential severity of impacts. As a result, comparisons between years can indicate relative levels of storm activity, but should not be done on a like-for-like basis.
Between the 2015-16 and 2024-25 storm seasons, there have been, on average, 7.7 named storms each year, with a high of 12 recorded in the 2023-24 season and a low of four over 2022-23. This is shown in the line chart below.
By this measure, 2025 was not exceptional with six named storms – two from the 2024-25 season and four from 2025-26. These are listed in the table below.
| Storm name | Date(s) of impact in UK | Maximum wind gust | Notable features |
|---|---|---|---|
| 2024-25 names | |||
| Éowyn | 24 January | 87Kt (100mph), Drumalbin, Lanarkshire | Most powerful storm for over a decade |
| Floris | 4-5 August | 71Kt (82mph) at Wick Airport, Caithness | Equalled Scotland’s August gust speed record |
| 2025-26 names | |||
| Amy | 3-4 October | 83Kt (96mph) at Tiree, Argyll | Significant disruption from flooding. |
| Benjamin (named by Meteo France) | 22-23 October | 52Kt (60mph) Needles, Isle Of Wight | Strongest winds affected northern France |
| Claudia (named by AEMET, Spain) | 14 November | 59Kt (68mph) Warcop Range, Cumbria | Extensive heavy rainfall across England and Wales |
| Bram | 8-10 December | 73Kt (84mph), Capel Curig, Conwy | Flooding from heavy rainfall on saturated ground. |
Credit: Met Office storm centre
Storm Éowyn in January had the most severe winds of any storm in 2025. The Met Office issued a red warning for wind across Northern Ireland and the south-west and central belt of Scotland. An amber warning was issued for the northern half of the UK. At the peak of the storm, power outages were reported at around 1m homes.
Storms from October to December were notable for bringing some persistent and heavy rain during a period of wetter weather, in contrast to the extended dry spell earlier in the year.
Weather through the year
The charts below show the progression of temperature and rainfall through the course of 2025.
The plot below charts average daily temperature over the course of 2025, with orange shading showing warmer-than-average conditions. Overall, the year had 244 days – 66% of the total – where temperatures were above average.
On the other hand, cold spells – indicated by blue shading – were generally short-lived and not very severe, with the exception of events in early January and November.
Fifty-one days in 2025 were in the top 5% warmest for the time of year in the historical record, but only one day – 20 November – was in the 5% of coldest.
The significant number of warmer days and absence of cool ones helps build a picture of how 2025 was the warmest year overall.
The highest daily maximum temperature recorded in the year was 35.8C at Faversham, Kent on 1 July during an early summer heatwave. The lowest minimum temperature was -18.9C, recorded at Altnaharra, Sutherland on 11 January.
A maximum annual temperature of 35.8C is not an exceptional high for recent years – especially when compared with 2022’s record of 40.3C. However it would have been a rare event in the 20th century, when just three years – 1932 (36.1C), 1976 (35.9C) and 1990 (37.1C) – saw a higher temperature.
In the 21st century, six years have seen temperatures above 35.8C – 2003, 2006, 2015, 2019, 2020, and 2022.
The plot below illustrates 2025’s below-average rainfall accumulation.
The brown shading – which represents the deficit in rainfall at that point of the year compared to the 1991-2020 average – highlights how rainfall totals were particularly low during the dry spring and summer period. The lower blue line shows how rainfall accumulation in 2025 came close to – but did not quite reach – a record low in late May and late August.
Wetter conditions in the autumn saw rainfall totals recover a little to reach 90% at the end of the year – which is below average, but not exceptional. As noted previously, there were regional variations.
Winter
In climate terms, the UK winter spans the calendar months of December, January and February.
The winter of 2024-25 was slightly warmer than average, but not exceptional, with an average temperature of 4.62C. This is 0.53C above the 1991-2020 average. The winter months had 89% of average rainfall and 94% of average sunshine.
New Year’s Day saw significant flooding that affected parts of Lancashire and the south side of Manchester. The River Mersey reached record levels in the wake of two days of heavy, persistent rain.
The coldest spell of 2025 occurred in early January, with significant snowfall in some regions.
Storm Éowyn and heavy rain at the end of January were the winter’s most impactful events, bringing high winds and flooding that resulted in considerable disruption.
Spring
Spring – which encompasses the months of March, April and May – was the warmest and sunniest on record, as well as the sixth driest.
The record high temperature came only one year after the previous record set in 2024, continuing a trend of increasing spring time temperature for the UK.
(A Met Office attribution analysis which explored the record-breaking temperatures of May 2024 showed that the temperatures were caused by a combination of a marine heatwave which persisted through May and into June and human-induced climate change.)
The timeseries below shows average spring temperature in the UK over 1884-2025. It shows a significant warming trend since the 1970s, with temperatures in 2024 and 2025 sitting well outside the range of variability observed in the late 19th and 20th centuries.
The UK’s changing climate is having an impact on the natural cycles of many species and habitats. Citizen science initiatives have highlighted how “signs of spring” – for instance, the first flowering or first nest-building – occur increasingly early in the year.
Summer
Warm, sunny and dry conditions persisted into the summer season, drying out soils.
There were four heatwave events, which impacted almost all regions of the UK. Two of these events took place in June.
A marine heatwave also took place, with sea surface temperatures of 1.5-3C above the 1983-2012 average in the Celtic Sea, English Channel and southern North Sea.
An attribution study by the World Weather Attribution service estimated that human-caused climate change had made exceeding June heatwave thresholds around 10 times more likely. The research also found that one of the June heatwaves had been made 2-4C more intense as a result of human influence.
The five warmest summers recorded in the UK to date are 2025 (16.10C), 2018 (15.76C), 2006 (15.75C), 2003 (15.74C) and 2022 (15.71C).
Met Office analysis estimates that in a pre-industrial climate, a summer like 2025 would be expected to occur every 340 years. However, in the current climate, we could expect to see these sorts of summers roughly once every five years.
The study also shows that the UK could plausibly experience much hotter summers in the current and future climate. Events that would have been seen as extremes in the past are becoming more common.
A Met Office attribution study published in 2019 estimated that the then record-breaking summer of 2018 had a statistical return period of approximately eight-to-nine years. The summer of 2025 has broken that record in seven years, consistent with these previous findings.
The science is clear that UK summers are becoming warmer and extreme heat events are becoming more common. This could mean more significant impacts on people, infrastructure and the environment – both now and in the future.
The map below plots the number of heatwaves that took place in June, July and August across the UK. It shows how a significant number of regions across saw more three (green shading) or four (pink shading) over the summer months.
Autumn
Autumn and the month of December were marked with unsettled weather, with mild and wet conditions over the four-month period.
The season was warmer and wetter than average. Northern Ireland had its third-wettest autumn on record, Northern England its fifth wettest and Wales its 10th wettest.
Storm Amy set a record for highest gust speed for a storm in October, with 80Kt (92mph) recorded at Magilligan, County Londonderry.
Other major storms were notable for heavy rainfall that caused flooding. Storm Claudia brought heavy rainfall to central England and Wales in mid-November, which fell on already saturated ground.
The second half of November saw snow cause across the North York Moors during a cold northerly spell which saw some hard frosts. This was followed by generally mild and unsettled conditions until late December, when strong easterly winds brought more low temperatures and hard frosts.
The UK chalked up a number of significant climate records in 2025, particularly for high temperatures. This aligns with the well-established warming trend that is the result of human-caused climate change.
Climate attribution studies continue to provide further evidence that human factors are increasing the likelihood and severity of UK climate extremes.
Many of 2025’s records will not stand for long. There is a high chance they will be broken again in the near future as the climate continues to warm.
The post Met Office: A review of the UK’s climate in 2025 appeared first on Carbon Brief.
Antarctic sea ice has recorded its third-smallest winter peak extent since satellite records began 48 years ago, new data reveals.
Provisional data from the US National Snow and Ice Data Center (NSIDC) shows that Antarctic sea ice hit its annual winter peak on 14 September, with an extent of 17.59m square kilometres (km2).
The organisation notes that the data is still preliminary, adding that “large fluctuations in extent are typical of Antarctic sea ice near the seasonal maximum”.
One expert tells Carbon Brief that it is “concerning to see these low values persisting”, but says that scientists need more time to determine whether this represents a “structural shift” in Antarctic sea ice extent.
Meanwhile, at the Earth’s other pole, Arctic sea ice reached its annual minimum on 12 September, ranking as the joint-10th lowest in the satellite record.
The NSIDC notes that the last 20 years have seen the lowest 20 Arctic sea ice extents in the satellite record.
Antarctic peak
Dr Lettie Roach, a polar climate scientist at the Alfred Wegener Institute in Germany, tells Carbon Brief that this year’s Antarctic sea ice maximum was “well below average for the season”. She warns that, “after several decades of stable or increasing winter Antarctic sea ice conditions, it is concerning to see these low values persisting”.
She adds:
“Compared with the Arctic, it’s less clear how recent changes in Antarctic sea ice are attributable to human-caused warming vs natural variability. We need more years of observations to better understand whether this is truly a structural shift.”
Dr Clare Eayrs, a postdoctoral researcher at the Korea Polar Research Institute (KOPRI), tells Carbon Brief that, since recording a “near-average February minimum” extent, Antarctic sea ice has “returned to unusually low winter coverage”.
She notes that Antarctic sea ice extent in July and August this year were the fifth and fourth lowest on record, respectively, adding that “all five of the lowest July extents have occurred since 2022 and all four of the lowest August extents since 2023”.
The chart below shows Antarctic sea ice extent in 2025 (dark blue) and 2026 (red) so far. For comparison, the chart shows decadal averages (dotted lines) as well as 2023 (mid blue), the year of the smallest winter sea-ice maximum on record.
Eayrs tells Carbon Brief that the regional pattern of Antarctic sea ice cover “changed substantially during the growth season”.
For example, she says that “in April, the Bellingshausen Sea remained almost entirely ice-free, while the neighbouring Amundsen Sea had more ice than usual”.
However, by late August, changes in atmospheric pressure and wind meant that “the Bellingshausen deficit had largely recovered, while ice was unusually scarce in the Amundsen Sea and across much of East Antarctica”.
Arctic minimum
Meanwhile, the Arctic recorded its minimum summer sea ice extent on 12 September. At 4.60m km2, this year ties with 2025, 2010 and 2008 as the 10th-lowest sea ice extent on record.
The chart below shows Arctic sea ice extent in 2025 (dark blue) and 2026 (red) so far. For comparison, the chart shows decadal averages (dotted lines) as well as 2012 (mid blue), the year of the smallest summer sea-ice minimum on record.
Roach tells Carbon Brief that although this minimum is not “record setting”, it is still “lower than any sea ice minimum before 2007”. She adds:
“Human-caused climate change has reduced Arctic sea ice cover and thickness, so the region is fundamentally different compared to a few decades ago.”
Scientists have been tracking Arctic sea ice thickness using a reanalysis produced called the Pan-Arctic Ice Ocean Modeling and Assimilation System (PIOMAS) since 1979.
In March 2026, the National Oceanographic and Atmospheric Administration (NOAA) terminated a global dataset of air pressure that scientists relied upon to produce PIOMAS, forcing both datasets to stop publishing updates.
The PIOMAS website says it will take “considerable effort and time” to find alternative data to use in their reanalysis. It adds that “we don’t yet have a good sense if that’s possible with available funds and if so, when we will be able to resume production of a new PIOMAS timeseries”.
Roach also notes that August saw record-breaking heat sweep across much of the world, explaining that high temperatures “extended into Arctic coastal regions, close to regions with substantial sea ice loss – particularly the Barents-Kara and East Siberian seas”.
Dr Zack Labe, a scientist at Climate Central, tells Carbon Brief that the absence of a new record does not mean that ice cover is becoming more “resilient”. He says:
“Local weather patterns across the Arctic play a really important role in year-to-year sea-ice extent, even as the long-term trend is clearly downward.”
Labe tells Carbon Brief that weather in the Arctic this summer was “influenced mainly by lower pressure toward the central Arctic, which brought cloudier and cooler conditions that limited surface melt and delayed the start of the melt season”.
He explains that this “was most obvious across parts of the Beaufort and Chukchi seas, where the melt season didn’t really kick off until after early July, which was more than two weeks later than normal”.
In contrast, he says, the Atlantic side of the Arctic “had a much more extreme summer”, with sea ice in the Barents Sea recording its “earliest melt-out on record”.
This was partly due to “unusually warm air and ocean temperatures”, Labe says. He notes, for example, that parts of western Siberia saw unusually persistent temperatures more than 5C above the 1981-2010 average for much of the summer, which extended out over the Kara Sea and contributed to substantial ice melt in this area”.
Labe tells Carbon Brief that, going forward, scientists need “more data and observations of other sea-ice metrics, like ice thickness, which may give us better insight into the overall condition of the ice pack, especially during years like 2026 when it is very fragmented”.
(In March 2026, Arctic sea ice reached its peak extent for this winter, clocking in as the joint-smallest in a satellite record going back almost half a century.)
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The post ‘Concerning’ low sea ice persists as Antarctic hits third-lowest winter peak appeared first on Carbon Brief.
‘Concerning’ low sea ice persists as Antarctic hits third-lowest winter peak
Participants at COP31 in Antalya will have a “duty” not to interfere in Türkiye’s internal affairs under the country’s hosting deal with the UN, reviving a clause dropped for last year’s climate summit in Brazil that human rights groups warn could put activists at risk.
Türkiye has faced growing criticism from human rights groups over the jailing of opposition figures, journalists and activists and imposed a blanket protest ban around July’s summit of the NATO military alliance in Ankara.
The contested provision is included in the binding agreement between the UN climate secretariat and the Turkish government that sets out responsibilities over logistical arrangements and details participants’ rights and obligations.
The document, signed in June but only made public on Wednesday, gives accredited COP31 attendees immunity from legal action over what they say, write or do in connection with the conference. Climate Home News understands that this safeguard can be applied to what takes place both inside and, in certain circumstances, outside of the UN-controlled COP “Blue Zone”. For the first time, this protection explicitly continues after the summit ends.
But participants enjoying these “privileges and immunities” also have a duty to respect Türkiye’s laws and regulations and not to interfere in its internal affairs, the agreement states. Rights groups fear its wide-ranging formulation could be used to discourage criticism of the host government.
Climate Home News understands that whether an action is covered by the immunity or infringes on the host’s internal affairs would be evaluated on a case-by-case basis, with close coordination between the country’s authorities and the UN climate change body.
A separate provision states that immunity shall be waived where the UN believes it would “impede the course of justice”.
‘Chilling effect’
Those same provisions featured in the host country agreements for COP28 in the United Arab Emirates and COP29 in Azerbaijan, both regarded as authoritarian regimes, before being dropped for COP30 in Brazil.
Ann Harrison, climate justice policy advisor at Amnesty International, said it is “extremely disappointing” that the COP31 agreement re-introduced clauses that could “hinder the ability of human rights defenders and civil society organisations to conduct their work safely”.
COP31 electrification pledge leaves out clean power commitment
She added the provisions could have a “wider chilling effect” on rights to freedom of expression and peaceful assembly, given concerns over the human rights situation in Türkiye, including laws that “have shrunk civic space” and their “abusive” implementation by authorities.
The UN climate change body declined to comment.
Rights groups have documented blanket protest bans, unlawful use of force by the police and prosecutions of journalists, human rights defenders and lawyers across Türkiye in the last year.
Arrests and protest bans
Last July, environmental activist Esra Işık was sentenced to more than two years for “resisting” a public official over what Amnesty International described as a peaceful protest against an urgent expropriation order linked to the expansion of coal mining in south-western Türkiye. She is appealing the conviction.
Ahead of a summit of the NATO alliance in the capital Ankara in July, authorities put in place a 13-day blanket ban on demonstrations, citing “national security”, and arrested over 200 people. Human Rights Watch said the crackdown showed Türkiye’s “ruthless intolerance of freedom of speech and assembly”.
Earlier this month, Turkish police detained dozens of people as part of what rights groups described as the government’s widening crackdown on LGBTQ+ activists and venues.
Questioned by media as to how he would guarantee the right to protest at COP31, Kurum said earlier in September that his team would “try to meet” any request they receive from civil society and give them “a free space to express themselves”.
“Don’t worry, thinking you will not be able to voice your opinions or really share your thoughts,” he said in an attempt to reassure campaigners, adding that he had put former deputy environment minister Mehmet Birpinar in charge of liaising with civil society.
Civic space needed
Camilla Pollera, human rights and climate change campaigner at the Center for International Environmental Law (CIEL), said meaningful participation at COP31 is fundamental to the legitimacy of climate action.
“At a climate summit, civil society participation necessarily includes being present, speaking out, scrutinising governments’ decisions and climate policies, and advocating for communities most vulnerable to climate change,” she added.
At last year’s COP30 summit, thousands of Indigenous people and climate activists peacefully marched through the Amazonian city of Belém in the first major demonstration outside the UN venue in four years. Smaller-scale demonstrations were largely confined to the “Blue Zone” at COP27 in Egypt, COP28 in the UAE and COP29 in Azerbaijan.
In two other separate incidents in Belém, members of the Munduruku tribe blocked access to the conference centre for hours, demanding an end to development projects in their ancestral land, and protesters stormed through the venue clashing with UN security officials.
The COP31 hosting agreement keeps some of the safeguards previously hailed by civil society groups. The government and the UN secretariat commit to upholding “the fundamental human rights” of all participants in the agreement’s preamble.
Under the deal, Türkiye also needs to ensure that security personnel follow “the highest ethical and professional standards and are expected to behave with integrity and respect”.
The post COP31 attendees told not to interfere in Türkiye’s “internal affairs” appeared first on Climate Home News.
COP31 attendees told not to interfere in Türkiye’s “internal affairs”
As rising seas submerge growing swathes of land, countries that lose territory should still keep their national boundaries, sovereign rights and UN membership, according to a political declaration adopted at the UN General Assembly in New York on Thursday.
The declaration, which was championed by climate-vulnerable small island states, affirms “the presumption in favour of continued statehood” in the face of sea level rise fuelled by climate change, and urges countries to work together to assist communities affected by encroaching oceans.
Speaking at a high-level UN meeting to address the existential threats posed by sea level rise, Cabo Verde’s Prime Minister Francisco Carvalho, one of the initiative’s co-facilitators along with Australia, said the adoption of the text by consensus sends “a message of hope”.
“This declaration has a very special meaning. For us, sea level rise is neither a distant threat nor a theoretical concern,” he said, adding that rising seas put at risk key infrastructure, water resources and economic growth in small island states.
In the Pacific, sea levels have risen at twice the global rate, dramatically increasing coastal flooding events from two to 20 a year in the Republic of the Marshall Islands, and from zero to 102 events per year in American Samoa, according to the World Meteorological Organization (WMO).
Surangel Whipps Jr., president of the Pacific island of Palau, said the summit in New York represents a “moment of international solidarity”, and highlighted that small island states will remain permanent members of the UN.
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Declaration recognises statehood
An advisory opinion by the world’s top maritime court, the International Tribunal on the Law of the Sea (ITLOS), first upheld in 2024 that countries do not have to shrink their maritime borders even if they lose land territory due to sea level rise. This was reiterated by the International Court of Justice in last year’s landmark ruling on the climate obligations of states.
The new declaration endorsed by all governments at the UN General Assembly stresses that sea level rise “is not a distant scenario but a real and lived experience for many”, and notes that international law must be implemented in global responses to rising seas.
UN Secretary-General António Guterres said the “milestone must now be translated into action”, adding that the declaration should encourage an “ongoing dialogue” at the “highest possible level” leading to practical outcomes. Pacific islands have proposed an international treaty on sea level rise that would provide more legal certainty.
“Those on the frontlines must be front and centre on every decision. We cannot allow countries and cultures to vanish beneath the waves,” he said. “The SOS has gone out. The world must answer.”
At regional summit, Pacific islands ask for COP31 support for clean energy and finance
Goodwin Friday, prime minister of St. Vincent and the Grenadines, said measures to protect vulnerable states will require adequate finance. “Investing in resilience now is more cost-effective than paying the far greater price for loss and damage later,” he added.
Championed by Australia’s COP31 co-presidency, Pacific islands have sought to put adaptation to sea level rise and ocean conservation at the top of the political agenda by inviting world leaders to attend the pre-COP31 summit co-hosted by Fiji and Tuvalu in October.
Tuvalu will also host the second global fossil fuel phase-out summit in April 2027, after around 60 governments met this year in Santa Marta, Colombia, to discuss ending their dependence on coal, oil and gas.
“Our coastlines, our reefs and our communities are living with the consequences of fossil fuel dependence every day, and our people have earned the right to help shape the way forward,” Lynda Tabuya, Fiji’s climate minister, said in a statement announcing details of the conference.
Ocean monitoring gets a boost in New York
Amid record-breaking marine heat and seas rising at unprecedented speed, governments in New York announced new commitments to protect the world’s ocean, as efforts to bolster marine ecosystems and coastal communities rise up the political agenda.
On Wednesday, the EU and Canada announced more funding for a new Europe-led ocean monitoring system called OceanEye, launched in the aftermath of a failed attempt by the Trump administration to dismantle the largest existing network of deep-sea observatories.
During an event at UN headquarters in New York, EU President Ursula von der Leyen and Canadian Prime Minister Mark Carney announced around $163 million in new funding for the initiative, with the EU pledging €92 million ($105m) on top of existing seed funding and Canada pledging C$82 million (US$58m) over five years.
According to an EU statement, while OceanEye will collaborate with the Global Ocean Observing System, that network “remains vulnerable to financial shortfalls and geopolitical disruptions”. A group of 30 countries from Europe, Africa and the Americas joined an international initiative in support of OceanEye, including large coastal nations like Brazil, Namibia and Mexico.
Von der Leyen said OceanEye “can make us the leading ocean data provider in a matter of years”, including by launching new satellites and installing new observatories in the deep ocean. “From outer space to the deepest ocean, our funding helps us keep watch beneath the waves,” she added.
Carney said the initiative would help protect Canada’s Arctic region with real-time monitoring operating year-round. “We can’t protect what we can’t see,” he said, also highlighting that Canada had expanded conservation of its ocean territory from 1% a decade ago to 15% now.
In New York, a group of 19 countries said they are either developing or implementing plans to sustainably manage all of their ocean territory, with 12 new nations joining the initiative. In a joint communiqué, they called on more countries to sign up ahead of COP31.
Warnings of El Niño-fuelled extreme heat
Scientists and world leaders have raised the alarm over this year’s record-breaking marine temperatures, which have persisted above historical peaks for more than 100 days as the naturally occurring El Niño phenomenon intensifies in the Pacific.
Extreme ocean heat could become a threat to coastal ecosystems and communities, experts fear. Water temperatures 1.5C above normal levels have also rapidly fuelled a strong hurricane in the Pacific in recent days.
Despite scientific calls for additional ocean conservation efforts, a report launched this week in New York warned that efforts to protect ocean ecosystems are lagging behind, with only 10% of the global ocean covered by conservation areas and just 3.5% designated as “effectively protected”.
The post Threatened by rising seas, small islands secure right to keep their statehood appeared first on Climate Home News.
Threatened by rising seas, small islands secure right to keep their statehood
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