Record Heat in Europe Kills Over 50,000, Study Shows

Extreme heat across Europe this summer contributed to the deaths of 50,391 people, according to a new study published in Nature Health.

Researchers from Imperial College London estimated that 32,619 of those deaths resulted directly from the added heat caused by burning coal, oil, and gas. This represents 65 percent of the total toll, a share that has risen from approximately 45 percent in the early 2000s.

The death count is 71 percent higher than the previous record set in 2022, when the same team recorded 29,480 heat-related deaths. The authors note that the current figure is likely an underestimate because the analysis covers only 854 cities, which house about 40 percent of the continent's population, and excludes a deadly heat wave in May.

Italy, France, Spain, and Germany recorded the highest number of deaths. Between June 17 and July 1, temperatures in these regions ran 5.3 degrees Celsius above normal, accounting for about one-third of the total deaths. 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.

Clair Barnes, the lead author and a climate scientist at Imperial College London, stated that some cities experienced temperatures 12 degrees Celsius above normal. She explained that much of Western and Northern Europe has infrastructure not designed for current temperature levels. Europe is now 2.5 degrees Celsius hotter than pre-industrial times, a level of warming Barnes said can shift conditions from uncomfortable to deadly.

To determine the impact of human-caused warming, the team ran computer simulations of a world without climate change and compared the results with actual summer data. Garyfallos Konstantinoudis, a biostatistician and co-author, noted that the model accounts for age groups and each city's optimal temperature, the point at which mortality is lowest.

The researchers validated their methods by comparing them with government estimates. For the heat waves in Britain in May and June, the model predicted 2,700 excess deaths, while the UK health statistics agency reported 2,800. Outside experts described the methodology as state-of-the-art.

Dr. Howard Frumkin, former director of the National Center for Environmental Health in the U.S., said that increasing summer heat and more accurate attribution tools are producing higher and more reliable death counts. Dr. Courtney Howard, president-elect of the Canadian Medical Association, urged investment in early-warning systems and equitable access to cooling. Dr. Jonathan Patz of the University of Wisconsin-Madison emphasized the need to stop fossil fuel burning to address the root cause of the rising temperatures.