Heatwave Linked to 2,300 Deaths Across Major European Cities: Study

Climate Change Blamed for 1,500 of 2,300 Heatwave Deaths in Europe: Study.

A severe heatwave that gripped parts of Western Europe late last month has been linked to an estimated 2,300 deaths across 12 major cities, according to a rapid scientific analysis released Wednesday. Of these, approximately 1,500 fatalities were directly attributable to climate change, researchers said.

The study, conducted by experts at Imperial College London and the London School of Hygiene and Tropical Medicine, examined the 10-day period ending July 2, during which temperatures soared past 40°C in Spain and wildfires erupted in France.

“Climate change has made it significantly hotter than it would have been, which in turn makes it a lot more dangerous,” said Dr Ben Clarke of Imperial College.

The analysis focused on cities such as Barcelona, Madrid, London, and Milan, where extreme temperatures—amplified by climate change—were up to 4°C higher than historical norms. Using peer-reviewed epidemiological models and past mortality data, the researchers estimated deaths caused by direct heat exposure or heat-aggravated health conditions.

The urgency of the analysis stems from the fact that most heat-related deaths are never formally recorded, and many governments delay or do not release such data.

Meanwhile, the EU’s Copernicus Climate Change Service confirmed that June 2025 was Western Europe’s hottest on record, with the continent experiencing widespread “very strong heat stress” — equivalent to a perceived temperature of 38°C or more. Globally, it was the third-warmest June on record.

“In a warming world, heatwaves are likely to become more frequent, more intense, and affect more people across Europe,” said Copernicus’ Samantha Burgess.

In 2023, another study had estimated that Europe’s 2022 summer heatwaves led to over 61,000 deaths, raising serious concerns over the region’s preparedness for extreme weather events fueled by climate change.

As the world continues to warm, researchers warn that the consequences of unmitigated greenhouse gas emissions will become deadlier—especially in urban areas already vulnerable to heat-related health risks.