Researchers estimated that climate change caused 16,500 deaths in European cities during the summer’s heatwaves. The study, led by experts from Imperial College London and the London School of Hygiene & Tropical Medicine, used climate modelling to link rising temperatures to excess mortality. This rapid analysis highlights the deadly impact of global warming.
The UK-based team analysed 854 European cities from June to August 2025. Using climate models, they found global warming raised temperatures by 2.2°C on average. Historical data showed 24,400 excess deaths during this period, with 70% (16,500) tied to climate change. The study, not yet peer-reviewed, aligns with prior research, like a 2023 Nature Medicine study reporting 47,000 heat-related deaths.
Rome topped the list with 835 estimated climate-related deaths, followed by Athens (630) and Paris (409). Over 85% of these deaths were among people aged 65 or older. The study, though limited to certain cities, suggests heatwaves tripled deaths due to a 1.3°C warmer world caused by fossil fuel burning.
Scientists can now attribute climate change-related deaths practically in real time. Here's how many people they estimate died due to this summer's heat waves in Europe https://t.co/XXGBWbwruG
— Bloomberg (@business) September 17, 2025Real-time death statistics are unavailable, as most countries release data slowly. Co-author Friederike Otto said the estimates are “in the right ballpark.” Akshay Deoras from the University of Reading noted the study’s conservative methods, suggesting the actual toll could be higher. This reflects heatwaves’ hidden impact, often recorded as heart or respiratory issues.
Europe’s fourth-hottest summer in 2025 underscores the growing threat of climate change. Heatwaves, called “silent killers,” are deadly for vulnerable groups like the elderly. This study urges action to cut emissions and protect communities, highlighting the urgent need for climate solutions to save lives.
The link between climate change and 16,500 heatwave deaths in Europe’s 2025 summer is a stark warning. As researchers call for action, the fight against global warming intensifies.
