A rapid scientific analysis published on July 9, 2025, estimates that around 2,300 people died from heat-related causes across 12 major European cities during a 10-day heatwave ending July 2.

Axar.az, citing Reuters, reports that the study, conducted by Imperial College London and the London School of Hygiene and Tropical Medicine, attributes 1,500 of these deaths to climate change, which intensified the heatwave by up to 4°C in cities like Madrid, London, Barcelona, and Milan.

Using established mortality models and historical data, researchers identified that climate change drastically increased the danger of the heat, especially for vulnerable populations.

June 2025 was Western Europe’s hottest June on record, while globally it was the third hottest. Experts warn that such deadly events will become more frequent and severe as greenhouse gas emissions continue to raise global temperatures.