Neat rows of new houses with solar panels on their turquoise roofs radiate out from the quiet central square of Aghali, a government-branded “smart village” in south-western Azerbaijan. A path lined with yellow bushes leads to the river, where a state-of-the-art hydropower plant produces clean electricity for residents.
Aghali is a pioneering example of Azerbaijan’s plan for “green” reconstruction of the territories it captured after a long, bloody conflict with Armenia, centred on the disputed Nagorno-Karabakh mountainous enclave.
Hundreds of Azeris displaced from the region in the early 1990s have moved back to Aghali, a local government official told Climate Home.
“The emotional link to these territories is very strong even though 30 years have passed,” the official said. “Our people are happy to be back”.
The government says more than 100,000 Azeris will return to populate the 30 or so new towns and villages planned across the area by 2026, which are expected to run mainly on clean energy and aim for “net zero” emissions.
Yet a more troubled story lies beneath the shiny surface presented by the authorities – part of Azerbaijan’s efforts to polish its green credentials before the COP29 UN climate summit it will host in November.
Some 136,000 ethnic Armenians who had called Nagorno-Karabakh their homeland fled in a mass exodus during a two-part military offensive by Azerbaijan that started in 2020 and ended last autumn.
For Armenian authorities and some human rights and legal experts, the drive amounted to “ethnic cleansing” – a phrase used in a European Parliament resolution on the conflict. A spokesperson for COP29 told Climate Home the Azerbaijan authorities “categorically reject this view”.
With the fighting now over, the two sides are engaged in talks to build a lasting peace. They struck an initial agreement to establish border demarcations in April, but hopes of a swift breakthrough on a permanent solution remain slim.
Meanwhile, displaced Armenians have said publicly they fear the heritage sites and homes they hastily left behind will be erased under a giant construction effort. Evidence of this was seen last month by Climate Home on a press trip organised and sponsored by the COP29 Presidency team, which controlled access to locations and sources in the region.
‘Net zero’ vision
Azerbaijan has built its prowess, both on and off the battlefield, on the strength of its vast oil and gas reserves. Around 60 percent of the government’s budget is financed through the sale of fossil fuels, primarily via export to Europe.
Last month, Azerbaijan President Ilham Aliyev called oil and gas “a gift from God” at the Petersberg Climate Dialogue in Berlin, signalling continued investment in increased gas production. That is despite signing up, like all countries, to a global agreement to transition away from fossil fuels “in keeping with the science” at the COP28 UN climate summit in Dubai last December.
Nonetheless, as its capital Baku gears up to host COP29, Azerbaijan also wants to show off its efforts to adopt clean energy and cut planet-heating emissions to the outside world.
Nagorno-Karabakh, and the surrounding provinces, lie at the centre of this push. The government has declared a “green energy zone” here, adding a dozen hydropower plants, and seeking to attract foreign investment in solar and wind.
Azerbaijan President Ilham Aliyev in front of a screw turbine hydro power plant in Zangilan, one of the territories recaptured in 2020. Photo: Azerbaijan Presidency
Across the country, the government wants renewables to make up 30 percent of its installed electricity capacity by 2030 – up from 7 percent in 2023. The main motivation is to reduce the use of gas in its own power stations so that more of it can be shipped to Europe, President Aliyev said during an event at ADA University in Baku in April.
Azerbaijan is also planning to achieve “net zero” carbon emissions in Karabakh by 2050, as outlined in its latest national climate action plan (NDC) submitted under the UN climate process. It says that “to revitalise the territories liberated from occupation”, the government will establish “smart” settlements, promote “green” energy zones, agriculture and transport, and reforest “thousands of hectares”.
For Anna Ohanyan, a senior scholar in the Russia and Eurasia programme at the US-based Carnegie Endowment for International Peace, “it’s greenwashing of an ethnic cleansing, pure and simple”.
“Azerbaijan is putting a stamp on the territory as a way to legitimise the conquest of Nagorno-Karabakh and doing so under the pretence of helping fight climate change,” she told Climate Home.
The COP29 spokesperson said in emailed comments that this view “has no basis in fact”, adding that Azerbaijan is rebuilding houses for its citizens who were internally displaced during the conflict, “according to UN sustainability standards”.
Disputed territory
Territorial disputes over the Nagorno-Karabakh region have a long and complex history.
“Azerbaijan and Armenia – both are convinced this is historic patrimony of their people,” said Audrey Altstadt, a professor of history at the University of Massachusetts Amherst who specialises in Azerbaijan.
As the Soviet Union set about governing its far-flung provinces in the 1920s, then Commissar of Nationalities, Joseph Stalin, ruled that the region should be part of Soviet Azerbaijan, even though ethnic Armenians made up 94% of its population at the time.
In the 1980s, alongside the fall of the Soviet Union, tensions began to rise after Nagorno-Karabakh’s governing authorities declared their intention to join Armenia and Azerbaijan reacted by attempting to suppress separatists.
After the two sides gained independence from the Soviet Union in 1991, clashes between them escalated into an all-out war.
By the time fighting stopped three years later, Azerbaijan had suffered a crushing defeat, losing not just Nagorno-Karabakh but also a sizable chunk of territory around it. Ethnic Armenians declared a separatist republic in the region with the backing of Armenia.
Evolution of territorial control over Nagorno-Karabakh, and surrounding districts, from the aftermath of the 1994 war until today. Graphic: Fanis Kollias
Some 870,000 Azeris abandoned their homes in the captured area and Armenia itself, while around 300,000 ethnic Armenians fled Azerbaijan, according to the United Nations’ refugee agency.
For 15 years the conflict remained frozen, while international actors – led by the United States, France and Russia – tried, and failed, to find a peaceful resolution.
Azerbaijan’s autocratic president, Aliyev, took matters into his own hands in September 2020, mounting a large-scale military offensive on Nagorno-Karabakh. Powered by more sophisticated weaponry, and backed by Türkiye, Azeri forces prevailed during a 44-day war that claimed the lives of at least 7,000 people – including over 100 civilians.
Under a ceasefire agreement signed in November 2020, Azerbaijan gained a significant proportion of Nagorno-Karabakh, including the coveted town of Shushi – called Shusha by Azeris – as well as winning control of adjacent districts.
Soon afterwards, Baku announced a colossal programme to rebuild and repopulate the region, establishing “green energy zones” in Nagorno-Karabakh and East Zangezur.
Rebuilding ‘from scratch’
Deep behind a string of police checkpoints, the plan is proceeding apace. It includes Aghali, one of the “smart” villages created by the government to accommodate Azeri citizens displaced from the area three decades ago.
“Everything we build here, starting from houses to schools, is based on the element of solar,” said Vahid Hajiyev, special representative of the Azerbaijan presidency in Jabrayil, Gubadli and Zangilan districts, addressing a group of international reporters.
“The whole area had been devastated,” added Hajiyev, saying it was largely abandoned and littered with mines after Armenia captured it. “We’re doing everything from scratch and that gives an opportunity to do it right.”
A view of Aghali, a “smart” village created by the Azerbaijani government in the territories retaken from Armenia, in April 2024. Photo: Matteo Civillini
A nearby screw hydro turbine provides electricity for the whole village, while homes are equipped with solar water heating systems, officials told Climate Home.
“Smart agriculture” projects are being developed to give work to the more than 860 people who, according to government figures, have already moved into the village, with hundreds more expected to join them soon, they added.
Climate Home was not able to talk to any of the residents, besides government officials, and was not shown around the homes.
Aghali offers a template for around 30 similar villages the Azeri government plans to erect across the captured regions. They are just one part of the mammoth construction drive in the Karabakh area, bankrolled by Baku to the tune of just under $2.5 billion a year – around 12% of total public spending.
While the official vision projects an eco-paradise, in Baku’s breakneck drive to put it into practice, the landscape currently resembles a sprawling construction site, as seen by Climate Home and shown by satellite images.
Travelling up the windy road to Shusha-Shushi just before midnight, the headlights of dump trucks and cement mixers pierced the near-total darkness.
They are the backbone of a giant effort to lay down thousands of kilometres of roads and railways and throw up brand-new airports, vast conference halls, hotels and apartments.
Globally, construction is among the most polluting industries, contributing around 10% of global carbon dioxide (CO2) emissions in 2022, according to the UN Environment Programme (UNEP).
In March 2022, the Azerbaijan government invited observers from UNEP to assess the environmental situation in the territories it had gained, after accusing Armenians of large-scale destruction and contamination of the water and soil.
The UNEP team documented “chemical pollution of water” and “deforestation” as a result of activities in dozens of mines and quarries carried out by the Armenian administration “with inadequate environmental oversight and supervision”.
But it also found that Azerbaijan’s building drive, then still in its infancy, was already putting further strains on the environment, as well as causing climate-heating emissions, thereby “adversely impacting the zero-emission goal for the region”.
The construction of new roads was “having a significant impact on forest cover”, its report stated, while the infrastructure programme “placed a significant burden on finite natural raw materials” extracted from local quarries to make cement or asphalt.
The construction drive is altering the landscape in Nagorno-Karabakh. Photo: Matteo Civillini/April 2024
The COP29 spokesperson said Azerbaijan is following the recommendations of the UNEP report and that “a number of mitigation measures have been undertaken” to curb the environmental footprint of the works.
“We believe that the net impact of the reconstruction effort will actually contribute to Azerbaijan’s climate change and decarbonisation goal,” the spokesperson added.
Nagorno-Karabakh’s net zero target has yet to be extended to the rest of the country. Currently Azerbaijan has a goal to reduce emissions 40% by 2050 and has promised to submit a new NDC that is aligned with limiting global warming to 1.5C, which is due by early 2025.
Environmental blockade
In December 2022, environmental concerns became a weapon in the long-running dispute over Nagorno-Karabakh. Azerbaijani eco-activists blocked the Lachin Corridor, the only road connecting the region to the outside world and a vital supply line for food and medicines.
They were ostensibly demonstrating over the impact of mining in the breakaway region. But, according to close watchers of the conflict, the protesters had been sent there by Baku – a claim denied by the COP29 spokesperson.
At the time, one protester told Climate Home that representatives from the Ministry of the Environment were also present. On many other occasions, the Azerbaijan government has cracked down on political dissent, according to human rights groups.
When, four months later, Azerbaijan erected a permanent checkpoint on the road to “prevent the illegal transportation of manpower and weapons”, the sit-in ended. But the blockade of Nagorno-Karabakh continued with only limited amounts of aid trickling in.
Shortages of food, medications and fuel plunged the region into a humanitarian crisis, according to UN human rights experts.
“In the end, it was hard to even find bread. There were women and kids queuing all night for a piece of bread,” recalled Siranush Sargsyan, an Armenian journalist from Nagorno-Karabakh, in an interview with Climate Home. “Even if they didn’t kill all of us, they were basically starving people.”
On September 19 2023, Azeri forces launched a lightning attack on the parts of Nagorno-Karabakh still controlled by ethnic Armenians in what Baku called “an anti-terrorist operation”. Within 24 hours, the de-facto government of the enclave surrendered and announced the republic would cease to exist the following January.
Fearing violence and persecution, over 100,000 ethnic Armenians – nearly the entire remaining population – fled their homes in Nagorno-Karabakh and sought refuge in Armenia.
Refugees from Nagorno-Karabakh region arrive at the Armenian border in a truck in September 2023. REUTERS/Irakli Gedenidze
“[The] liberation of territories was a main goal of my political life. And I’m proud that these goals have been achieved,” President Aliyev, whose family has ruled over Azerbaijan for the past 31 years, said last December. “I think we brought peace. We brought peace by war.”
Now in full control of Nagorno-Karabakh, Azerbaijan is doubling down on its efforts to reshape the region and move tens of thousands of Azeris there. “We will continue the ‘Great Return’ campaign until all those who were forced from their homes can go home,” the COP29 spokesperson said, referring to internally displaced Azeris.
Government officials told Climate Home that ethnic Armenians are also welcome to go back, but only if they stick to the conditions imposed by Baku.
Journalist Sargsyan said returning to Nagorno-Karabakh under Azeri control is out of the question as she fears for her safety. “I left everything there”, she said. “But I would rather die than end up in a prison in Azerbaijan.”
Heritage destruction
Meanwhile, ethnic Armenians fear the huge Azeri construction drive now underway will erase most, if not all, of their legacy.
Nijat Karimov, a special adviser to Azerbaijan’s presidency, told Climate Home that Baku had destroyed Armenian government buildings in Nagorno-Karabakh for “safety” reasons, without giving specifics. He added that Azerbaijan’s government had since “repaired and rehabilitated” the villages.
A day later, Climate Home travelled past what little remains of Karintak village (known as Dashalti in Azeri). Nestled in a gorge sitting just below Shusha-Shushi, it was home to a few hundred ethnic Armenians until Azeri forces took over at the end of 2020.
Now nearly the entire settlement appears to have been razed to the ground, as Climate Home witnessed. Mounds of disturbed soil surround a large mosque, under construction, and a church, one of the few original buildings left standing.
The village of Karintak (bottom right corner), as seen in April 2024 when Climate Home was taken through the region. Photo: Matteo Civillini
Climate Home asked the COP29 Presidency what had happened to the village. A spokesperson said government experts would need to examine the satellite images, buildings and sites referenced in Climate Home’s question “to get a complete answer”.
The case of Karintak is not an isolated one, according to Caucasus Heritage Watch, a research group led by archaeologists at Cornell and Purdue Universities. They have documented the destruction of at least eight Armenian cultural heritage sites – including churches and a cemetery – in the retaken territories since 2021.
Lucrative contracts
Baku says its grand vision is to repopulate Nagorno-Karabakh and the neighbouring areas, attract foreign business and eventually turn them into tourism destinations. But when Climate Home visited, most of what had been built appeared to be under-used, while access to the region is severely restricted.
Two international airports, completed in just 10-15 months a mere 70 km apart, have very little air traffic, except for the occasional charter flight, tracking data shows. A third airfield is now being erected nearby.
In Shusha-Shushi, a five-star spa hotel complex with sleek marble interiors was inaugurated just over a year ago. When Climate Home walked past last month, there was not a client in sight, with only wandering labourers headed to nearby construction sites.
The 5-star Shusha Hotel appeared empty when Climate Home visited in April 2024. Photo: Matteo Civillini
Historian Altstadt said the reconstruction is being driven by multiple incentives. “Yes, it is to get people back to the land they left over 30 years ago, and it is also to put their stamp on it to show ‘this is our territory and we can do what we want’,” she told Climate Home. “But there is also a lot of money to be made by Azerbaijan’s oligarchs.”
Pasha Holding is a conglomerate controlled by the powerful Pashayev family of First Lady Mehriban Aliyeva. It is heavily involved in the rebuilding of Nagorno-Karabakh. It also manages huge tracts of agricultural land and new hotels, and is opening bank branches and supermarkets.
The vast amount of money – and assets – up for grabs is also attracting considerable foreign interest.
Turkish firm Kalyon – considered to have close ties to Prime Minister Recep Tayyip Erdogan, according to Reporters Without Borders – has won major construction contracts in the territories. And mining permits in Karabakh have been awarded to a group run by pro-Erdogan businessman Mehmet Cengiz.
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British architects Chapman Taylor are earning at least $2.3 million to map out the redevelopment of Shusha-Shushi – which thousands of ethnic Armenians fled following Azeri attacks in 2020 – and will also work on the urban design of other towns.
BP, meanwhile, is developing a 240-megawatt solar power plant in Jabrayil district, with construction expected to begin later this year. Speaking at Baku Energy Week in 2022, Gary Jones, the energy firm’s regional president for Azerbaijan, Georgia and Turkey, praised Baku’s efforts to turn Karabakh into “the heart of sustainable development”.
Adopting contested terminology used by Azerbaijan, he said the “liberated territories” are “blessed with some of the country’s best solar and geothermal resources”, creating the “perfect opportunity for a fully net zero system” that “can be built fresh from a new start”.
BP and Chapman Taylor did not respond to Climate Home’s request for comment.
Special presidential representative Hajiyev told Climate Home that many international companies are interested in working in Karabakh. “It’s a huge investment opportunity because a lot of government incentives are provided here,” he said.
(Reporting by Matteo Civillini in Azerbaijan; editing by Megan Rowling and Joe Lo; fact-checking by Sebastian Rodriguez)
Matteo Civillini visited Nagorno-Karabakh, and the surrounding districts, as part of an “energy media tour” organised and sponsored by the COP29 Presidency.
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In Nagorno-Karabakh, Azerbaijan’s net zero vision clashes with legacy of war
Climate Change
CCC: Heathrow expansion could push flights to ‘80% of UK emissions by 2050’
Aviation is on track to be responsible for 80% of the UK’s carbon dioxide (CO2) emissions by 2050, according to the Climate Change Committee (CCC).
Emissions from flying have more than doubled since 1990 – driven by rising passenger numbers – even as the climate impact of every other sector in the UK economy has fallen.
The UK does not have “credible” policies in place to reverse this trend of rising emissions, says the CCC in new advice to the government on future aviation policy.
The government has signalled its support for expanding Heathrow, the nation’s largest airport, while relying on “techno-fixes” such as “sustainable aviation fuels” (SAFs) to cut emissions.
Yet, even without Heathrow expansion, the CCC says aviation emissions are on track to be higher in 2050 than they are today – reaching 38m tonnes of CO2 (MtCO2).
As the chart below shows, this would account for most of the remaining CO2 from the UK economy, all of which would need to be removed from the atmosphere in order to meet the legal target of net-zero emissions.
Expanding Heathrow would add another 2.4MtCO2 in 2050, amounting to around 5% of all the UK’s emissions. (This would increase to 4.5MtCO2 when expansion is complete in 2054.)
With a final decision on Heathrow expansion expected by 2029, the government asked the CCC for its advice on whether the plan is compatible with the UK’s climate targets.
The CCC has concluded that the UK simply lacks sufficient policies to reduce aviation emissions and “expanding Heathrow would compound the problem”. In a press briefing, CCC chair Nigel Topping told journalists:
“The UK does not currently have a credible plan to reduce [aviation emissions] in line with net-zero, so that creates a serious challenge for meeting our climate commitments.”
The “jet-zero strategy”, launched by the previous Conservative government in 2022, set out plans to cut aviation emissions. However, the Labour government has since accepted that the strategy’s expectations for SAFs, electric planes and fuel-efficiency improvements were unrealistic.
The CCC says a “credible and robust net-zero policy framework for aviation” should be set out in a revised strategy, which is planned for 2027. Only then could Heathrow expansion be aligned with the net-zero goal, adds the committee.
As part of this new strategy, the CCC says the “aviation sector needs to take responsibility for its emissions”. It says policies should be designed based on the “polluter pays” principle, requiring the aviation industry to fund its own SAFs and CO2 removal.
Specifically, the committee says funding will be needed for “engineered removal” technologies, such as direct air carbon capture and storage (DACCS).
These technologies are currently “not yet available at the scale required”, but are vital for the kind of permanent CO2 removal needed to mop up aviation emissions, says the CCC.
(“Natural solutions” such as tree planting are the other main way CO2 is expected to be removed from the atmosphere. However, the CCC envisages these removals offsetting the remaining methane emissions from livestock agriculture in the UK, whereas it says “engineered removals” would be required to remove and store CO2 from flights.)
The CCC acknowledges that placing decarbonisation costs on airlines would likely lead to higher ticket prices. It estimates that this could mean an increase, in 2024 prices, of around £150 for a return trip to Alicante, Spain, and £400 for a return trip to New York by 2050.
However, it says this is preferable to a public spending approach, which would result in the roughly 50% of the population who do not fly paying for flight-related CO2 removals.
In addition, the committee notes that higher costs would help to manage demand for flights, which would otherwise be expected to increase considerably over the coming decades.
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The post CCC: Heathrow expansion could push flights to ‘80% of UK emissions by 2050’ appeared first on Carbon Brief.
CCC: Heathrow expansion could push flights to ‘80% of UK emissions by 2050’
Climate Change
International trade linked to 20% of global emissions – but imports ignored
A fifth of the world’s greenhouse gas emissions are linked to international trade in goods and services, a new tracker shows, spotlighting a little-studied issue that researchers say should be tackled by the UN climate process.
Currently, as part of the Paris Agreement, every country is responsible for counting and reducing the planet-heating emissions that are produced within its territory. Manufacturing countries, for example, may have high emissions even if what they make is exported for consumption elsewhere.
But new analysis from the European Climate Foundation (ECF) and climate consultancy Matière, based on the tracker’s data, shows that some countries have a high footprint of “imported emissions” from goods and services they ship in. These emissions are often ignored in the places where the products are consumed because they are not formally counted under greenhouse gas inventories.
In the European Union, for example, while domestic emissions have declined since 2015, imported emissions have remained unchanged, the analysis shows. In some countries, like Austria or Sweden, they are as high as the country’s entire annual carbon footprint.
Former EU lead climate negotiator Jacob Werksman said that under the Paris Agreement, these traded emissions are accounted for in the countries where they are originally produced, but importing countries can also take responsibility for their consumption.
“It starts with a wide recognition by many jurisdictions around the world that we need to know the carbon content of these products, and we then need to agree what is a fair, effective, transparent and relatively easy-to-implement way of measuring that carbon in traded products,” he told a launch event for the trade emissions tracker, which contains data for different countries, sectors and gases.
Trade and its role in addressing climate change has become a higher priority at UN climate talks after a push led by emerging economies including China, India and South Africa led to the first trade and climate change dialogue held this year at the mid-year session in Bonn.
At the upcoming COP31 UN summit in Antalya, some voluntary initiatives like the Brazil-led Integrated Forum on Climate Change and Trade are expected to continue, but the issue does not feature in Türkiye’s Action Agenda of climate initiatives and formal negotiations are not scheduled on the topic.
China: the world’s top emissions exporter
As a manufacturing powerhouse, China ranks first in the new tracker as the world’s top-emitting country, but the data shows that a large chunk of the country’s carbon emissions – an amount larger than Brazil’s entire annual carbon footprint – are linked to products that are exported and consumed abroad.
Russia, Brazil, the US and the EU rank as the top destinations for Chinese trade-related emissions, which are mostly linked to components for power generation, basic metals like copper and lead, and non-metallic minerals like graphite and phosphorus.
Yet China is also the world’s top emissions importer, related mostly to agricultural products, fossil fuels and minerals brought from the US, the EU, Japan and India, among others. The US ranks second by a close margin, with both countries importing about 1.6 billion tonnes of CO2 equivalent.
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Richard Baron, ECF’s industrial policy and trade director, said Chinese clean energy products are key for reducing emissions around the world, adding that Europe is “not able to do without those technologies” for its energy transition.
“China has an emissions trading system that counts CO2 differently there. But if China and the EU were to agree on some kind of translation mechanism to say ‘this is how we measure it’, and companies can understand the protocol to navigate both markets, that would set the tone for a lot of other conversations,” he said at the platform’s launch event last week.
The analysis suggests that if the EU and China aligned their climate requirements for products, the resulting standards could influence trade flows representing about 7% of global emissions.
Baron said there’s “a plethora” of multilateral spaces to hold these discussions, including the climate and trade dialogue at the UN climate talks or the Climate Club at the Organisation for Economic Co-operation and Development (OECD), which seeks to cut industrial emissions.
Trade breaks into agenda of UN climate talks – but will it have teeth?
Controversial trade measures
Instruments like the Europe’s Carbon Border Adjustment Mechanism (CBAM) – a recent piece of legislation that penalises emissions-heavy imported products – are one tool that could be used to address trade-related emissions, said Antoine Oger, executive director at the Institute for European Environmental Policy.
He said a significant portion of imported emissions in Europe are already covered by CBAM, as it includes sectors like cement, iron and steel, fertilisers and aluminium. This then allows the EU “to engage in constructive dialogue with our trade partners”, he added.


But across diplomatic summits, including at UN climate talks, emerging economies have pushed back heavily against the CBAM and other trade measures. The most recent BRICS declaration adopted on Saturday by 11 such countries – including China, India and Russia – condemns “protectionism under the guise of environmental objectives”.
The declaration calls for the “elimination of such unlawful measures”, which they argue have “far-reaching negative implications for the human rights, including the rights to development, health and food security” of vulnerable communities.
“The question of responsibility is a political question,” Oger said. “These emissions exist – they are emitted somewhere to make a product that will be consumed elsewhere. So you can debate responsibility but the idea is for the two parts to recognise there’s a problem.”
The aim, he added “is not to point fingers, but to accept this is a reality of our emissions profiles and ask what we can do about it”.
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International trade linked to 20% of global emissions – but imports ignored
Climate Change
Revealed: England’s June 2026 heatwave sparked record demand for ambulances
All the ambulance services in England experienced some of their busiest-ever days during this summer’s record-breaking June heatwave, according to data obtained by Carbon Brief.
In June, temperatures climbed past 37C in parts of the country as authorities declared only the second ever “red” extreme heat warning.
Four out of 10 NHS ambulance services, including London’s, responded to unprecedented numbers of life-threatening emergencies on at least one day from 23-27 June.
Another two services – in the south-west and east of the country – received their highest volume of 999 calls on record.
Ambulance services provided data on their busiest days since records began, in response to freedom-of-information (FOI) requests from Carbon Brief.
The results show how demand during the June heatwave exceeded levels seen during the traditionally busy winter season in other years – and even the height of the Covid-19 pandemic – for many services.
Heat demand
Extreme heat ramps up the risk of numerous life-threatening conditions, including heart disease and respiratory problems.
England experienced record-breaking temperatures at the end of June, with the whole country covered by amber or red “heat health alerts” from the government.
A red alert, which was issued for the entire Midlands and south of England, indicates “significant risk to life for even the healthy population”. This was only the second time such an alert has been triggered.
Researchers calculated that there were nearly 3,000 heat-related deaths in the UK this summer. There has also been unprecedented demand for A&E departments and some ambulance services.
To investigate the strain facing ambulances, Carbon Brief sent FOI requests to the 10 NHS ambulance trusts in England, asking for lists of their busiest days.
This covered both the total volume of 999 calls and “category 1” responses – referring to incidents involving “life-threatening injuries and illnesses”, such as heart attacks.
The chart below shows the busiest days on record for England’s ambulances, including both total calls and category 1 responses. Most services were able to provide records back to the 2010s. (See: Methodology.)
The five-day period from 23-27 June is overrepresented in these results, with at least two heatwave days ranking in the top 20 for every service in the country.

This trend is especially pronounced in the south and east of England, where June temperatures exceeded 36C and even approached 38C in some regions.
London, South East Coast, South Central and North East ambulance services all reported daily records for responding to life-threatening emergencies during the heatwave.
For the South East Coast and South Central services – which cover a region stretching from Oxfordshire to Kent – 25, 26 and 27 June all saw unprecedented numbers of category 1 callouts.
South Western and East of England services both saw record numbers of 999 calls on 26 June, the same day the highest-ever June UK temperature was reported in Norfolk.
It is worth noting that demand for ambulance services – including category 1 calls – has been growing for many years, driven by factors such as an ageing population, more complex health conditions and growing mental-health pressures.
This helps to explain why dates from before the 2020s are rare in the top rankings provided to Carbon Brief.
Beyond the heatwave, 2026 as a whole is on track to be a record year for ambulance demand.
‘Stifling heat’
On 26 June, the busiest day of the heatwave, ambulances across England responded to 4,084 life-threatening emergencies.
The average daily volume of such incidents is normally around 2,500 during the summer months.
Stu Holliday, head of emergency preparedness, resilience and response at North East Ambulance Service, tells Carbon Brief:
“During periods of hot weather, we typically see an increase in calls from people affected by dehydration, heat exhaustion and heatstroke, as well as those whose existing health conditions, particularly heart and respiratory illnesses, can be made worse by prolonged high temperatures.
“Older people, young children and pregnant people can be especially vulnerable.”
Ambulance teams are generally busier in the winter because cold weather and seasonal illnesses drive up the number of severe medical emergencies.
However, the data from June shows that extremely hot days are starting to match or even edge out cold ones as the busiest days. This is a trend seen across the healthcare system.
While not every service provided records back to 2019, the data broadly shows that ambulances were busier during the heatwave than at the height of the Covid-19 pandemic.
As well as patients, heatwaves put pressure on ambulance workers. The UNISON union has warned of crews facing “stifling heat with faulty or no air conditioning” and “back-to-back callouts” due to increased demand.
Methodology
Carbon Brief requested data on the top 50 busiest days for England’s 10 main ambulance services.
These are: London; South East Coast; South Central; South Western; West Midlands; East Midlands; East of England; North East; Yorkshire; and North West.
Data was requested for as far back as service records go. Most were able to provide records going back to some point in the 2010s, with the exception of North East and South Central, which only had records from 2021 and 2022 onwards, respectively.
Rising annual demand for ambulance services means that most of the busiest days for ambulances have been in the 2020s. For example, all but four of the busiest days for category 1 emergencies reported to Carbon Brief were in the 2020s.
Carbon Brief requested data on ambulance demand for all the UK nations. In Scotland and Northern Ireland – where temperatures are cooler – services did not see call volumes reach the top 50 rankings during the June heatwave. The Welsh Ambulance Service did not respond to Carbon Brief’s request.
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Revealed: England’s June 2026 heatwave sparked record demand for ambulances
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Guest post: Why China is still building new coal – and when it might stop
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Greenhouse Gases2 years ago嘉宾来稿:满足中国增长的用电需求 光伏加储能“比新建煤电更实惠”
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Greenhouse Gases1 year ago
Guest post: Why China is still building new coal – and when it might stop
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Climate Change2 years ago嘉宾来稿:满足中国增长的用电需求 光伏加储能“比新建煤电更实惠”
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Renewable Energy11 months agoSending Progressive Philanthropist George Soros to Prison?
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Climate Change2 years ago
Bill Discounting Climate Change in Florida’s Energy Policy Awaits DeSantis’ Approval
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Greenhouse Gases1 year ago
嘉宾来稿:探究火山喷发如何影响气候预测
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Carbon Footprint2 years agoUS SEC’s Climate Disclosure Rules Spur Renewed Interest in Carbon Credits
