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The new study has not been peer-reviewed, a sometimes lengthy process where other scientists evaluate the research, Otto said, adding that the methods it used to attribute deaths had undergone peer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
The case shows that climate change is a fundamental human rights violation—and the victory of Bonaire, a Dutch territory, could open the door for similar lawsuits globally.
From our collaborating partner Living on Earth, public radio’s environmental news magazine, an interview by Paloma Beltran with Greenpeace Netherlands campaigner Eefje de Kroon.
A Tiny Caribbean Island Sued the Netherlands Over Climate Change, and Won
Climate Change
Greenpeace organisations to appeal USD $345 million court judgment in Energy Transfer’s intimidation lawsuit
SYDNEY, Saturday 28 February 2026 — Greenpeace International and Greenpeace organisations in the US announce they will seek a new trial and, if necessary, appeal the decision with the North Dakota Supreme Court following a North Dakota District Court judgment today awarding Energy Transfer (ET) USD $345 million.
ET’s SLAPP suit remains a blatant attempt to silence free speech, erase Indigenous leadership of the Standing Rock movement, and punish solidarity with peaceful resistance to the Dakota Access Pipeline. Greenpeace International will also continue to seek damages for ET’s bullying lawsuits under EU anti-SLAPP legislation in the Netherlands.
Mads Christensen, Greenpeace International Executive Director said: “Energy Transfer’s attempts to silence us are failing. Greenpeace International will continue to resist intimidation tactics. We will not be silenced. We will only get louder, joining our voices to those of our allies all around the world against the corporate polluters and billionaire oligarchs who prioritise profits over people and the planet.
“With hard-won freedoms under threat and the climate crisis accelerating, the stakes of this legal fight couldn’t be higher. Through appeals in the US and Greenpeace International’s groundbreaking anti-SLAPP case in the Netherlands, we are exploring every option to hold Energy Transfer accountable for multiple abusive lawsuits and show all power-hungry bullies that their attacks will only result in a stronger people-powered movement.”
The Court’s final judgment today rejects some of the jury verdict delivered in March 2025, but still awards hundreds of millions of dollars to ET without a sound basis in law. The Greenpeace defendants will continue to press their arguments that the US Constitution does not allow liability here, that ET did not present evidence to support its claims, that the Court admitted inflammatory and irrelevant evidence at trial and excluded other evidence supporting the defense, and that the jury pool in Mandan could not be impartial.[1][2]
ET’s back-to-back lawsuits against Greenpeace International and the US organisations Greenpeace USA (Greenpeace Inc.) and Greenpeace Fund are clear-cut examples of SLAPPs — lawsuits attempting to bury nonprofits and activists in legal fees, push them towards bankruptcy and ultimately silence dissent.[3] Greenpeace International, which is based in the Netherlands, is pursuing justice in Europe, with a suit against ET under Dutch law and the European Union’s new anti-SLAPP directive, a landmark test of the new legislation which could help set a powerful precedent against corporate bullying.[4]
Kate Smolski, Program Director at Greenpeace Australia Pacific, said: “This is part of a worrying trend globally: fossil fuel corporations are increasingly using litigation to attack and silence ordinary people and groups using the law to challenge their polluting operations — and we’re not immune to these tactics here in Australia.
“Rulings like this have a chilling effect on democracy and public interest litigation — we must unite against these silencing tactics as bad for Australians and bad for our democracy. Our movement is stronger than any corporate bully, and grows even stronger when under attack.”
Energy Transfer’s SLAPPs are part of a wave of abusive lawsuits filed by Big Oil companies like Shell, Total, and ENI against Greenpeace entities in recent years.[3] A couple of these cases have been successfully stopped in their tracks. This includes Greenpeace France successfully defeating TotalEnergies’ SLAPP on 28 March 2024, and Greenpeace UK and Greenpeace International forcing Shell to back down from its SLAPP on 10 December 2024.
-ENDS-
Images available in Greenpeace Media Library
Notes:
[1] The judgment entered by North Dakota District Court Judge Gion follows a jury verdict finding Greenpeace entities liable for more than US$660 million on March 19, 2025. Judge Gion subsequently threw out several items from the jury’s verdict, reducing the total damages to approximately US$345 million.
[2] Public statements from the independent Trial Monitoring Committee
[3] Energy Transfer’s first lawsuit was filed in federal court in 2017 under the RICO Act – the Racketeer Influenced and Corrupt Organizations Act, a US federal statute designed to prosecute mob activity. The case was dismissed in 2019, with the judge stating the evidence fell “far short” of what was needed to establish a RICO enterprise. The federal court did not decide on Energy Transfer’s claims based on state law, so Energy Transfer promptly filed a new case in a North Dakota state court with these and other state law claims.
[4] Greenpeace International sent a Notice of Liability to Energy Transfer on 23 July 2024, informing the pipeline giant of Greenpeace International’s intention to bring an anti-SLAPP lawsuit against the company in a Dutch Court. After Energy Transfer declined to accept liability on multiple occasions (September 2024, December 2024), Greenpeace International initiated the first test of the European Union’s anti-SLAPP Directive on 11 February 2025 by filing a lawsuit in Dutch court against Energy Transfer. The case was officially registered in the docket of the Court of Amsterdam on 2 July, 2025. Greenpeace International seeks to recover all damages and costs it has suffered as a result of Energy Transfers’s back-to-back, abusive lawsuits demanding hundreds of millions of dollars from Greenpeace International and the Greenpeace organisations in the US. The next hearing in the Court of Amsterdam is scheduled for 16 April, 2026.
Media contact:
Kate O’Callaghan on 0406 231 892 or kate.ocallaghan@greenpeace.org
The Trump administration’s relentless rollback of public health and environmental protections has allowed widespread toxic exposures to flourish, warn experts who helped implement safeguards now under assault.
In a new report that outlines a dozen high-risk pollutants given new life thanks to weakened, delayed or rescinded regulations, the Environmental Protection Network, a nonprofit, nonpartisan group of hundreds of former Environmental Protection Agency staff, warns that the EPA under President Donald Trump has abandoned the agency’s core mission of protecting people and the environment from preventable toxic exposures.
Former EPA Staff Detail Expanding Pollution Risks Under Trump
A Tiny Caribbean Island Sued the Netherlands Over Climate Change, and Won
Greenpeace organisations to appeal USD $345 million court judgment in Energy Transfer’s intimidation lawsuit
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