The rapid analysis found that climate change was responsible for around 68% of the 24,400 estimated heat-related deaths this summer. Warmer conditions, amplified by human-driven climate change, increased daily temperatures by an average of 2.2°C, with peaks of up to 3.6°C.
The report highlights how even small increases in temperature can result in thousands of avoidable deaths – with older adults particularly vulnerable. People aged 65 and over made up 85% of the estimated deaths.
When spring and especially summer comes the heat waves will fuck millions
In the 2025 summer, Climate change-driven summer heat caused 16,500 additional deaths across Europe, study estimates
The formal report: Summer heat deaths in 854 European cities more than tripled due to climate change