European Heatwave Claims 50,391 Lives as Climate Change Accelerates Mortality
A new study attributes nearly two-thirds of this summer's excess deaths to human-caused warming, marking a 71 percent increase over the previous record.
By Chioma Brooks ·
More than 50,000 people died across Europe this summer due to extreme heat, with the majority of those fatalities linked to human-caused climate change. A study published in Nature Health estimates that 50,391 individuals died because of warmer temperatures in 854 European cities during June, July, and August. Researchers determined that 32,619 of those deaths resulted specifically from the additional heat generated by burning coal, oil, and gas.
The death toll is 71 percent higher than the previous deadliest summer in 2022, when the same research team counted 29,480 heat-related deaths. The authors note that the current figures likely represent an underestimate because the analysis excludes a deadly heat wave in May and covers only 854 cities, which contain approximately 40 percent of the continent's population. Italy, France, Spain, and Germany recorded the highest numbers of victims.
Garyfallos Konstantinoudis, a biostatistician at Imperial College London, stated that about one-third of the deaths occurred between June 17 and July 1, when temperatures ran 5.3 degrees Celsius above normal. While more than half of the victims were aged 85 or older, the heat also killed more than 800 people between the ages of 20 and 44. Lead author Clair Barnes, a climate scientist also at Imperial College London, observed that some cities experienced temperatures 12 degrees Celsius above normal.
Barnes explained that infrastructure in much of Western and Northern Europe is not designed to handle current temperature levels. She added that Europe is the fastest-warming continent and is now 2.5 degrees Celsius hotter than in pre-industrial times. This extra warming can shift conditions from uncomfortable to dangerous and potentially deadly. The team used computer simulations of a world without climate change to separate natural heat from climate-driven heat, finding that the share of heat deaths attributable to warming has risen from about 45 percent in the early 2000s to 65 percent now.
The researchers relied on statistical modelling to account for age and each city's optimal temperature, as heat deaths are often underreported and not recorded on death certificates. They validated their results against government estimates, which mostly matched. For the May and June heat waves in Britain, the model produced 2,700 excess deaths, while the United Kingdom's health statistics agency reported 2,800. Several outside experts described the methods as state-of-the-art.
Dr. Howard Frumkin, former director of the National Center for Environmental Health in the U.S., noted that summers are getting hotter while tools for attributing deaths to heat are becoming more accurate. He said these trends produce higher and more reliable counts. Dr. Courtney Howard, president-elect of the Canadian Medical Association, called for investment in early-warning systems, equitable access to low-carbon cooling, and neighborhood buddy systems for people most at risk. Dr. Jonathan Patz of the University of Wisconsin-Madison stressed the need to address fossil fuel burning, noting that society cannot keep mopping up the mess without thinking about turning the faucet off.
