Welcome to Carbon Brief’s DeBriefed.
An essential guide to the week’s key developments relating to climate change.
This week
Global heatwave
SOUTH ASIA: Extended and severe heatwaves that continue to grip 50% of northwest India have claimed at least 110 lives and caused 40,000 to suffer from suspected heatstroke, the Hindustan Times reported. Delhi recorded its highest ever minimum temperature in a 55- year record this week, when night-time temperatures did not drop below 35.2C, the Hindu reported. Reuters reported that a senior government official said “Indian cities have become heat traps” due to unbalanced urban growth reducing water availability.
EAST ASIA: Meanwhile, state-run newspaper China Daily reported that the nation is “experiencing more frequent and intense heatwaves due to global warming”, according to China’s National Climate Centre. It added that the average heatwave starting date has advanced by 2.5 days per decade. The Hong Kong-based South China Morning Post reported that extreme weather has continued in China this week, including deadly torrential rain and drought conditions.
DEADLY PILGRIMAGE: In the Middle East, more than 1,000 hajj pilgrims have reportedly died amid scorching heat in the holy city of Mecca in Saudi Arabia, Sky News reported. Agence France-Presse said that temperatures reached 51.8C in Mecca as around 1.8 million people took part in the “days-long, mostly outdoor” pilgrimage. It added that the death toll is expected to rise further as many continue to search for family members.
US FURNACE: Tens of millions of people in the US were under dangerous heat warnings this week as some cities faced record-breaking temperatures, the Associated Press reported. The Guardian reported that about 80% of the country’s population are experiencing “a kind of heatwave not seen in decades”, which brought prolonged periods of temperatures above 32.2C, “under a weather phenomenon known as a heat dome”.
‘BRUTAL’ EUROPE: After registering Europe’s highest recorded temperature of 48.8C in 2021, Sicily is again having to turn away tourists as “brutal heatwaves” have led to crops dying and farm animals facing slaughter, reported the Times. Elsewhere in Europe, a wildfire near Athens, Greece forced dozens to flee their homes, reported Reuters. Officials said the fire was the result of arson and spread quickly in hot, dry conditions, the newswire added.
Around the world
- G7 DROPPED: The G7 group of major economies has pledged to speed up their transition away from fossil fuels at a summit in Italy, Reuters reported. It added that activists were unhappy at the pace of progress.
- RECORD RENEWABLES: Wind and solar combined added more new energy to the global mix than any other source for the first time in history in 2023, according to Carbon Brief analysis of newly released data.
- PEAKING CHINA: China has reduced power from fossil fuels and boosted solar and hydro, “feeding hopes that the world’s biggest polluter may have peaked emissions years before its own deadline”, Bloomberg reported. Carbon Brief analysis in May found China may have peaked its emissions in 2023.
- CONFLICT DAMAGE: A UN report found that Israel’s assault on Gaza has caused environmental damage, “deeply harming people’s health, food security and Gaza’s resilience”, according to Reuters.
- NATURE WIN: After months of stagnation, the EU’s nature restoration law was voted through by ministers at the EU council, the Financial Times reported.
- STRANDED BY SLIDES: Al Jazeera reported that landslides triggered by heavy rain have left hundreds of thousands of people stranded and at least 15 dead in India and Bangladesh.
$1.1-1.3 trillion
The amount of climate finance developing countries at Bonn want developed countries to provide to them every year, according to Climate Home News.
Latest climate research
- New research in Environmental Research Letters suggested that the Arctic will be “ice-free” – that is, where sea ice extent drops below one million square kilometres – at the end of summer when global warming reaches between 1.5C and 2.2C above pre-industrial levels.
- Ocean-based carbon dioxide removal techniques such as ocean alkalinity enhancement have been “overlooked”, a research paper in Environmental Research Letters argued.
- The extreme heat that hit southwestern US, Mexico and Central America from May to June this year was 35 times more likely and 1.4C hotter due to climate change, new analysis by the World Weather Attribution network found.
(For more, see Carbon Brief’s in-depth daily summaries of the top climate news stories on Monday, Tuesday, Wednesday, Thursday and Friday.)
Captured

New Carbon Brief analysis by Dr Simon Evans revealed that the UK’s energy bills were £22bn higher over the past decade than they would have been if successive Conservative governments had not cut the “green crap” by rolling back climate policies for areas such as insulating homes, new home building standards and onshore wind and solar growth. The chart above shows how lack of progress on various climate measures has added to UK energy bills from 2015-2024. The cutting back on green measures has also raised net gas imports by a third, making the UK more reliant on gas imports and leaving customers more exposed to high gas prices, the analysis said. Carbon Brief is continuing to track where UK parties stand on climate change and energy ahead of the country’s general election.
Spotlight
Can beavers help the UK adapt to climate change?
This week, Carbon Brief looks at the evidence on the potential pros and pitfalls of reintroducing beavers to help deal with rising climate risks in the UK.
From Narnia to the Ice Age franchise, beavers have a spot as a charismatic, comical and – until recent years – somewhat mythical animal in British popular culture.
Beavers were hunted to extinction in Britain 400 years ago, and to near extinction in Europe. Memory of their presence in Britain survives in place names, such as Beverley Brook in London.
Given their reputation, it is perhaps surprising that they have also been called “climate heroes”, “ecosystem engineers” and, more recently, “heatwave heroes”.
Such labels come from beavers’ ability to alter the landscapes around them, offering benefits such as lowering flood risk or providing new habitats for biodiversity.
It is these benefits that have seen beavers reintroduced to some areas of England and Scotland.
Climate and biodiversity benefits
Beavers are a keystone species, which means they have an inordinately large impact on their natural environment, with the ability to define their ecosystem.
They use their huge front teeth to fell trees, building dams and lodges,which subsequently hold back huge volumes of water to create a wetland habitat.
The animals do this to create their ideal environment – one with deep water so they can hide from predators. However, they also inadvertently create an oasis for a variety of wildlife.

Earlier this week, the Guardian reported that, after living in the wild for 15 years in Scotland, beavers create the “perfect conditions” for endangered native water voles to flourish.
Prof Richard Brazier, director of the Centre for Resilience in Environment, Water and Waste at the University of Exeter, said the main climate benefits beavers can provide were enhancing water and carbon storage. He told Carbon Brief:
“Beaver ponds store a lot of carbon, nitrogen and phosphorus. Beavers coppice [chop down] species like willow. When they regrow, it enhances carbon storage in the landscape.”
Climate change is making many types of extreme weather events, including droughts, more likely and more intense.
Beaver wetlands are known to remain oases in otherwise cracked, dry land. The water stored in beaver ponds slowly seeps into the surrounding soil during dry periods, keeping the area green.
In the US, research found that wetland habitats created by beavers are resistant to wildfires because the area is simply too wet to burn.
Perhaps the most well-known link between beavers and climate adaptation is their alleviation of flood risks.
In March, the UK government’s Environment Agency reported that, after five years of beaver activity in an enclosed area, the impact of flooding was reduced in Spains Hall Estate, Essex.
In Devon, scientists last month concluded a 10-year study finding that beavers are “having a positive impact on flood and drought alleviation” by storing 24m litres of water and reducing storm flows by 30% during heavy rainfall, keeping downstream homes safer from floods.
Human-animal conflict
Other studies on beavers have warned that friction between the animals and adjacent landowners must be a central consideration for successful reintroduction.
Under certain circumstances, their natural engineering can interfere with human infrastructure and farming.
Some farmers are concerned that beaver activity causes flooding and damage to crops. Others worry that tree felling could cause damage to houses nearby.
Occasionally, beaver burrows can collapse, and damage property or machinery nearby.
Brazier told Carbon Brief that “tensions can arise” when humans “try to resist the natural instinct of the beaver to create deep water pools”. He added:
“If there are downsides, these relate to the ways in which, by building dams, beavers put water back on floodplains, when humans tend to want to remove this water, such as for agriculture. But these low-lying landscapes are floodplains, they are meant to be underwater periodically, and indeed, whether beavers are reintroduced or not, they will be more inundated by flooding in the future, under climate change scenarios.”
Beaver releases
Despite opposition from some groups, momentum has been gradually building for beavers’ return to the wild.
It is still illegal to reintroduce beavers in Britain without a licence.
In 2009, illegal releases were made in Tayside, Scotland and Devon, England. It is unknown where the beavers came from.
The first licence for beaver reintroduction was given for an enclosed area in Ham Fen in Kent in 2001.
In 2009, the first licensed reintroduction of beavers into the wild occurred in Knapdale, Scotland, with the animals shipped in from Norway.
In 2021, the government allowed the illegally released beavers in Devon to remain wild.
Beavers are also being reintroduced into cities. They were reintroduced in Enfield, north London in 2022 – and it was there that the first kit was born in London last summer.
Beavers were declared a native species in 2016 in Scotland and in 2022 in England.
However, the UK government is yet to introduce a national strategy for beaver reintroduction – “missing a huge opportunity to deliver profound benefits”, according to Brazier.
Watch, read, listen
MOVIE MAGIC: Showing in UK and Irish cinemas, Wilding tells the story of a couple who in 2001 handed over their 4,000-year-old estate and struggling farm to nature.
STORY TIME: With the help of woolly mammoths and dinosaurs, Christine Shearer and illustrator Kaz Clarke have published “The Everywhere Atom: A Journey Through The Carbon Cycle and Climate Change”, telling the story of the carbon cycle to children.
NATURE VOTE: With the UK general election two weeks away, Carbon Brief’s Dr Simon Evans spoke to Radio 4’s Rare Earth about how climate and the environment feature in the main political parties’ manifestos.
Coming up
- 22-30 June: London Climate Action Week
- 28 June: Iran presidential election
- 28 June: Mongolia parliamentary election
Pick of the jobs
- UN Environment Programme, project coordinator | Salary: Unknown. Location: Dominica
- West of England Combined Authority, south west net-zero hub programme manager | Salary: £60,204-£65,858. Location: Bristol, UK
- HM Treasury, policy adviser, green finance | Salary: £39,500-£48,720. Location: UK
- University of Cambridge, Climate Governance Initiative programme director. Salary: £61,823-£63,029. Location: Cambridge, UK
DeBriefed is edited by Daisy Dunne. Please send any tips or feedback to debriefed@carbonbrief.org.
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The post DeBriefed: Deadly heat grips globe; Cost of cutting ‘green crap’ in UK; Rewilding with beavers appeared first on Carbon Brief.
DeBriefed: Deadly heat grips globe; Cost of cutting ‘green crap’ in UK; Rewilding with beavers
Climate Change
Night Skies and Shifting Stars: How Indigenous Celestial Knowledge Tracks a Changing Climate
When the land no longer answers the stars the way it once did, Indigenous peoples are among the first to notice — and the first to ask why.
A Sky Full of Knowledge
Look up on a clear night on Turtle Island and you’re seeing a sky that has guided human life for thousands of years. Across Indigenous nations in Canada, detailed systems of celestial knowledge developed not as abstract science but as living, practical guides —telling people when to plant, when to harvest, when herds would move, and when ice would come. This astronomical knowledge was woven into language, ceremony, and everyday life, passed down through generations with remarkable precision.
The Mi’kmaq and the Celestial Bear
Among the Mi’kmaq of Atlantic Canada, star stories are ecological calendars, precise and functional. The story of Muin and the Seven Bird Hunters connects the annual movement of what Western astronomy calls Ursa Major to the seasonal cycle of hunting and harvest: the bear rises in spring, is hunted through summer, and falls to earth in autumn. This knowledge was brought to broader public attention in 2009 during the International Year of Astronomy, when Mi’kmaq Elders Lillian Marshall of Potlotek First Nation and Murdena Marshall of Eskasoni First Nation shared the story through an animated film produced at Cape Breton University narrated in English, French, and Mi’kmaq.¹ The story encodes specific observations about when and where to hunt, and which species to expect at which time of year. It is science in narrative form.
The Anishinaabe and the Seasonal Star Map
Among the Anishinaabe peoples of the Great Lakes and northern Ontario, celestial knowledge forms part of a comprehensive seasonal understanding. Knowledge keepers like Michael Wassegijig Price of Wikwemikong First Nation have described how Anishinaabe constellations quite different from those of Western astronomy connect the movement of the heavens to naming ceremonies, seasonal gatherings, and land practices.² The Royal Astronomical Society of Canada now offers planispheres featuring Indigenous constellations from Cree, Ojibwe, and Dakota sky traditions, recognizing their value as both cultural heritage and ecological knowledge systems.³
When the Stars and the Land Fall Out of Rhythm
Here’s the challenge that climate change has introduced: the stars still move on their ancient, reliable schedule. But the land no longer always responds as expected. Migratory birds that once arrived when certain constellations appeared are now showing up earlier or later. Ice that once formed in predictable windows is forming weeks late, or not at all. Berry harvests, fish runs, animal migrations, all once timed by celestial cues accumulated over millennia are shifting. Indigenous knowledge holders across Canada describe this as a kind of dissonance: the sky remains faithful, but the land has changed.⁴
Long-Baseline Ecological Records
Far from being historical curiosity, Indigenous celestial knowledge systems are now being recognized by researchers as long-baseline ecological calendars —records of how nature behaved over centuries, encoded in story and ceremony. When an Elder observes that a particular star rising no longer predicts the arrival of certain geese, that observation represents a departure from a pattern that may have held true for hundreds of years. The Climate Atlas of Canada integrates Indigenous knowledge observations alongside western climate data, recognizing that both contribute meaningfully to understanding ecological change.⁵
Keeping the Knowledge Alive
Language revitalization and land-based education programs are helping ensure this knowledge reaches the future. From youth astronomy nights on-reserve to the integration of Indigenous sky stories in school curricula, there is growing recognition that these knowledge systems belong to what comes next, not only what came before. As Canada grapples with accelerating ecological change, the quiet precision of thousands of years of skyward observation offers something no satellite can fully replicate: a continuous record of the relationship between the cosmos and a living land.
Blog by Rye Karonhiowanen Barberstock
Image Credit: Dustin Bowdige, Unsplash
References
[1] Marshall, L., Marshall, M., Harris, P., & Bartlett, C. (2010). Muin and the Seven Bird Hunters: A Mi’kmaw Night Sky Story. Cape Breton University Press. See also: Integrative Science, CBU. (2009). Background on the Making of the Muin Video for IYA2009. http://www.integrativescience.ca/uploads/activities/BACKGROUND-making-video-Muin-Seven-Bird-Hunters-IYA-binder.pdf
[2] Price, M.W. (Various). Anishinaabe celestial knowledge. Wikwemikong First Nation. Referenced in: Royal Astronomical Society of Canada Indigenous Astronomy resources.
[3] Royal Astronomical Society of Canada. (2020). Indigenous Skies planisphere series. RASC. https://www.rasc.ca/indigenous-skies
[4] Neilson, H. (2022, December 11). The night sky over Mi’kmaki: A Q&A with astronomer Hilding Neilson. CBC News. https://www.cbc.ca/news/canada/newfoundland-labrador/hilding-neilson-indigenizing-astronomy-1.6679072
[5] Climate Atlas of Canada. (2024). Prairie Climate Centre, University of Winnipeg. https://climateatlas.ca/
The post Night Skies and Shifting Stars: How Indigenous Celestial Knowledge Tracks a Changing Climate appeared first on Indigenous Climate Hub.
https://indigenousclimatehub.ca/2026/04/night-skies-and-shifting-stars-how-indigenous-celestial-knowledge-tracks-a-changing-climate/
Climate Change
World ‘will not see significant return to coal’ in 2026 – despite Iran crisis
A much-discussed “return to coal” by some countries in the wake of the Iran war is likely to be far more limited than thought, amounting to a global rise of no more than 1.8% in coal power output this year.
The new analysis by thinktank Ember, shared exclusively with Carbon Brief, is a “worst-case” scenario and the reality could be even lower.
Separate data shows that, to date, there has been no “return to coal” in 2026.
While some countries, such as Japan, Pakistan and the Philippines, have responded to disrupted gas supplies with plans to increase their coal use, the new analysis shows that these actions will likely result in a “small rise” at most.
In fact, the decline of coal power in some countries and the potential for global electricity demand growth to slow down could mean coal generation continues falling this year.
Experts tell Carbon Brief that “the big story isn’t about a coal comeback” and any increase in coal use is “merely masking a longer-term structural decline”.
Instead, they say clean-energy projects are emerging as more appealing investments during the fossil-fuel driven energy crisis.
‘Return to coal’
The conflict following the US-Israeli attacks on Iran has disrupted global gas supplies, particularly after Iran blocked the strait of Hormuz, a key chokepoint in the Persian Gulf.
A fifth of the world’s liquified natural gas (LNG) is normally shipped through this region, mainly supplying Asian countries. The blockage in this supply route means there is now less gas available and the remaining supplies are more expensive.
(Note that while the strait usually carries a fifth of LNG trade, this amounts to a much smaller share of global gas supplies overall, with most gas being moved via pipelines.)
With gas supplies constrained and prices remaining well above pre-conflict levels, at least eight countries in Asia and Europe have announced plans to increase their coal-fired electricity generation, or to review or delay plans to phase out coal power.
These nations include Japan, South Korea, Bangladesh, the Philippines, Thailand, Pakistan, Germany and Italy. Many of these nations are major users of coal power.
Such announcements have triggered a wave of reporting by global media outlets and analysts about a “return to coal”. Some have lamented a trend that is “incompatible with climate imperatives”, while others have even framed this as a positive development that illustrates coal’s return “from the dead”.
This mirrors a trend seen after Russia’s invasion of Ukraine in 2022, which many commentators said would lead to a surge in European coal use, due to disrupted gas supplies from Russia.
In fact, despite a spike in 2022, EU coal use has returned to its “terminal decline” and reached a historic low in 2025.
Gas to coal
So far, the evidence suggests that there has been no return to coal in 2026.
Analysis by the Centre for Research on Energy and Clean Air found that, in March, coal power generation remained flat globally and a fall in gas-fired generation was “offset by large increases in solar and wind power, rather than coal”.
However, as some governments only announced their coal plans towards the end of March, these figures may not capture their impact.
To get a sense of what that impact could be, Ember assessed the impact of coal policy changes and market responses across 16 countries, plus the 27 member states of the EU, which together accounted for 95% of total coal power generation in 2025.
For each country, the analysis considers a maximum “worst-case” scenario for switching from gas to coal power in the face of high gas prices.
It also considers the potential for any out-of-service coal power plants to return and for there to be delays in previously expected closures as a result of the response to the energy crisis.
Ember concludes that these factors could increase coal use by 175 terawatt hours (TWh), or 1.8%, in 2026 compared to 2025.
(This increase is measured relative to what would have happened without the energy crisis and does not account for wider trends in electricity generation from coal, which could see demand decline overall. Last year, coal power dropped by 63TWh, or 0.6%.)
Roughly three-quarters of the global effect in the Ember analysis is from potential gas-to-coal switching in China and the EU.
Other notable increases could come from switching in India and Indonesia and – to a lesser extent – from coal-policy shifts in South Korea, Bangladesh and Pakistan.
However, widely reported policy changes by Japan, Thailand and the Philippines are estimated to have very little, if any, impact on coal-power generation in 2026. The table below briefly summarises the potential for and reasoning behind the estimated increases in coal generation in each country in 2026.
Dave Jones, chief analyst at Ember, stresses that the 1.8% figure is an upper estimate, telling Carbon Brief:
“This would only happen if gas prices remained very high for the rest of the year and if there were sufficient coal stocks at power plants. The real risk of higher coal burn in 2026 comes not from coal units returning…but rather from pockets of gas-to-coal switching by existing power plants, primarily in China and the EU.”
Moreover, Jones says there is a real chance that global coal power could continue falling over the course of this year, partly driven by the energy crisis. He explains:
“If the energy crisis starts to dent electricity demand growth, coal generation – as well as gas generation – might actually be lower than before the crisis.”
‘Structural decline’
Energy experts tell Carbon Brief that Ember’s analysis aligns with their own assessments of the state of coal power.
Coal already had lower operation costs than gas before the energy crisis. This means that coal power plants were already being run at high levels in coal-dependent Asian economies that also use imported LNG to generate electricity. As such, they have limited potential to cut their need for LNG by further increasing coal generation.
Christine Shearer, who manages the global coal plant tracker at Global Energy Monitor, tells Carbon Brief that, in the EU, there is a shrinking pool of countries where gas-to-coal switching is possible:
“In Europe, coal fleets are smaller, older and increasingly uneconomic, while wind, solar and storage are becoming more competitive and widespread.”
In the context of the energy crisis, Italy has announced plans to delay its coal phaseout from 2025 to 2038. This plan, dismissed by the ECCO thinktank as “ineffective and costly”, would have minimal impact given coal only provides around 1% of the country’s power.
Notably, experts say that there is no evidence of the kind of structural “return to coal” that would spark concerns about countries’ climate goals. There have been no new coal plants announced in recent weeks.
Suzie Marshall, a policy advisor working on the “coal-to-clean transition” at E3G, tells Carbon Brief:
“We’re seeing possible delayed retirements and higher utilisation [of existing coal plants], as understandable emergency measures to keep the lights on, but not investment in new coal projects…Any short-term increase in coal consumption that we may see in response to this ongoing energy crisis is merely masking a longer-term structural decline.”
With cost-competitive solar, wind and batteries given a boost over fossil fuels by the energy crisis, there have been numerous announcements about new renewable energy projects since the start of war, including from India, Japan and Indonesia.
Shearer says that, rather than a “sustained coal comeback” in 2026, the Iran war “strengthens the case for renewables”. She says:
“If anything, a second gas shock in less than five years strengthens the case for renewables as the more secure long-term path.”
Jones says that Ember expects “little change in overall fossil generation, but with a small rise in coal and a fall in gas” in 2026. He adds:
“This would maximise gas-to-coal switching globally outside of the US, leaving no possibility for further switching in future years. Therefore, the big story isn’t about a coal comeback. It’s about how the relative economics of renewables, compared to fossil fuels, have been given a superboost by the crisis.”
The post World ‘will not see significant return to coal’ in 2026 – despite Iran crisis appeared first on Carbon Brief.
World ‘will not see significant return to coal’ in 2026 – despite Iran crisis
Climate Change
Disaster Declarations Ripple Through South Texas Amid Water Crisis
Small towns around Corpus Christi worry where they’ll fall on the pecking order if the region’s water runs out.
At least six small cities and towns in the Coastal Bend region of Texas issued disaster declarations in the last two weeks, begging not to be forgotten amid a spiraling water crisis.
Disaster Declarations Ripple Through South Texas Amid Water Crisis
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