Ten days of extreme heat killed 2,305 people in a sample of 12 European cities last month, with almost two-thirds of those deaths caused by climate change’s intensifying effect on heatwaves, new research estimated on Wednesday.
The early summer heatwave, which sparked wildfires and health warnings from Spain to Turkey, was between 2 and 4 degrees Celsius hotter than it would have been without climate change, according to the study by the Grantham Institute at Imperial College London and the London School of Hygiene and Tropical Medicine (LSHTM).
“These numbers represent real people who have lost their lives in the last days due to the extreme heat”, said Imperial College London climate scientist Friederike Otto.
“If we continue to follow the wishes of the fossil fuel industry and delay serious mitigation [emissions-cutting] further, more and more people will lose their lives for the financial benefit of only a tiny rich influential minority,” she told reporters during a conference call.
Separately, a report by the European Union’s Copernicus Climate Change Service said last month was the hottest June on record in Western Europe.
Otto highlighted the researchers’ rapid work in calculating the role of climate change in the overall death toll, which she hailed as a first.
Rapid attribution study
Previously, such research has taken months. A study into Europe’s 2022 heatwave, which found that climate change was responsible for just over half of the 68,000 deaths, was published a year later.
The new study has not been peer-reviewed, a sometimes lengthy process where other scientists evaluate the research, Otto said, adding that the methods it used to attribute deaths had undergone peer review and been approved.
She said publishing studies quickly is important because the immediate aftermath of a heatwave is “when people talk about it”. That is also why the researchers focused on a sample of just 12 cities, she said, making their analysis more manageable.
Previous studies from the World Weather Attribution group, which Otto co-leads, have only estimated how much hotter climate change has made a heatwave. Otto said she wanted to translate this into numbers of additional deaths because a temperature increase of a few degrees Celsius “might not sound very much”.
Otto said the reason the first study like this was carried out in Europe is because scientists have established the relationship between heat and deaths better in Europe than elsewhere. But there are parts of southern Africa, Asia and the USA where this relationship has been established by scientists, she said, so “we will probably do this again in other parts of the world”.
But LSHTM climate professor Malcolm Mistry, warned that carrying out this kind of study across the world would be “very challenging because not every public health authority wants to give out the mortality record reports for research purposes”. This data on deaths is key to establishing how many people are killed by a certain increase in temperature.
Silent killer
The study did not attribute any individual death to climate change and heat is generally not listed on death certificates. Most people who died had health problems exacerbated by the heat, and more than half of them were aged over 85.
Heatwaves are a “silent killer” because the deaths mostly take place in homes and hospitals, away from public view, and are rarely reported, said Pierre Masselot from the LSHTM.
But media reports have blamed last month’s soaring temperatures in some specific cases, such as the death of 48-year old builder who collapsed while laying concrete in 35C heat in the Italian city of Bologna, and a 53-year old woman with a heart condition who died in Palermo. Climate Home has spoken to relatives of people who died during extreme heat in Saudi Arabia and the Gaza Strip.
Otto said that too many media reports about heatwaves include photographs of children eating ice cream and happy people playing on the beach. “That’s a massive problem”, she said, although she added that more articles were now referring to the role of climate change in driving heatwaves.
The researchers behind the study said ways to cope with extreme heat included installing air conditioning, improving government heatwave warnings, planting more trees, building more parks, insulating buildings and painting roofs white.
“But at the end of the day,” said Masselot, “all these measures won’t probably be as efficient as just reducing climate change altogether [by] reducing our greenhouse gas emissions.”
The post Scientists hail rapid estimate of climate change’s role in heat deaths as a first appeared first on Climate Home News.
Scientists hail rapid estimate of climate change’s role in heat deaths as a first
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Maine Presses Pause on Large Data Centers. Will Other States Follow Its Lead?
The moratorium is the first of its type to pass a legislative chamber, but about a dozen other states have pending proposals.
Maine is now the first state to pass a moratorium on the development of large data centers, and others may follow.
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The Trump EPA’s repeal of the 2009 endangerment finding revokes the agency’s authority to regulate climate pollution. Environmental activists are mourning the loss while vowing to resurrect it.
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IEA slashes pre-war oil demand forecast by nearly a million barrels per day
Global oil demand is expected to be almost one million barrels per day less than was forecast before the Iran war, as shortages and soaring costs prompt drastic cutbacks by consumers and businesses, a report by the International Energy Agency (IEA) said on Wednesday.
With the closure of the Strait of Hormuz choking off supplies and keeping prices high, less oil is being used to make products such as jet fuel, LPG cooking gas and petrochemicals, the Paris-based IEA said in its monthly oil report, forecasting the biggest quarterly demand drop since the COVID pandemic.
The Iran war “upends our global outlook”, the government-backed agency said, adding that it now expects oil demand to shrink by 80,000 barrels per day in 2026 from last year.
Before the conflict began, the IEA said in February it expected oil demand to rise by 850,000 barrels per day this year, meaning the difference between the pre-war and current estimates is 930,000 barrels a day, or 340 million barrels a year.
That could have a significant impact on the outlook for planet-heating carbon emissions this year.
At an intensity of 434 kg of carbon dioxide per barrel of oil – the estimate used by the US Environmental Protection Agency – the annual reduction in carbon dioxide emissions from oil for 2026, compared with the pre-war forecast, is similar to the amount emitted by the Philippines each year.
Harry Benham, senior advisor at Carbon Tracker, told Climate Home News that he expects at least half of the reduction in oil demand to be permanent because of efficiency gains, behavioural change and faster electrification.
The oil shock is leading to oil being replaced, especially in transport, with electricity and other fuels, just as past oil shocks drove lasting reductions in consumption, he said. “The shock doesn’t delay the transition – it reinforces it,” he added.
Demand takes a hit
While demand for oil has fallen significantly, supplies have fallen even further. Supply in March was 10 million barrels a day less than February, the IEA said, calling it the “largest disruption in history”.
This forecast relies on the assumption that regular deliveries of oil and gas from the Middle East will resume by the middle of the year, the IEA said, although the prospects for this “remain unclear at this stage”.
Last month, US Energy Secretary Chris Wright told the CERAWeek oil industry conference that prices were not high enough to lead to permanent reductions in demand for oil, known as demand destruction.
But the IEA said on Wednesday that “demand destruction will spread as scarcity and higher prices persist”.
Industries contributing to weaker demand for oil include Asian petrochemical producers, who are cutting production as oil supplies dry up, the report said, while consumers are cutting back on liquefied petroleum gas (LPG), which is mainly used as a cooking gas in developing countries, the IEA said.
Flight cancellations caused by the war have dampened demand for oil-based jet fuel, the IEA said. As well as cancellations caused by risk from the conflict itself, airports have warned that fuel shortages could lead to disruption.
Across the world, governments, businesses and consumers have sought to reduce their oil use after the war. The government of Pakistan has cut the speed limit on its roads, so that people drive at a more fuel-efficient speed, and Laos has encouraged people to work from home to preserve scarce petrol and diesel.
Nepal’s EV revolution pays off as oil crisis causes pain at the pumps
Consumers in Bangladesh are seeking electric vehicles (EVs) to avoid fuel queues and, in Nigeria, more people are seeking to replace petrol and diesel generators with solar panels, Climate Home News has reported.
In the longer term, the European Union is considering cutting taxes on electricity to help it replace fossil fuels and France is promoting EVs and heat pumps.
IEA urged to help “future-proof” economies
Meanwhile, the IEA came under fire last week from energy security experts, including former military chiefs, who signed an open letter in which they accused the agency of offering “only a temporary response to turbulent markets”, calling for stronger structural action “to future-proof our economies”.
They said that besides releasing emergency oil stocks and offering advice on how to reduce oil demand in the short term, the IEA should show countries how to reduce their exposure to volatile oil and gas markets.
The IEA has also been under pressure from the Trump administration to talk less about the transition away from fossil fuels.
This article was amended on 15 April 2026 to correct the drop in 2026 forecast oil demand from “nearly a billion” to “nearly a million”
The post IEA slashes pre-war oil demand forecast by nearly a million barrels per day appeared first on Climate Home News.
IEA slashes pre-war oil demand forecast by nearly a million barrels per day
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