Europe's summer heat killed 50,391

A new analysis of summer 2026 data indicates that extreme heat claimed the lives of 50,391 people across Europe. The study, to be published in Nature Health, attributes 32,619 of those fatalities to additional warming caused by the burning of coal, oil, and gas.

Researchers modeled heat-related mortality by age group in 854 European cities. The team examined repeated heat waves that occurred in June, July, and August. They determined that temperatures in some locations ran 12 C above normal levels during the period.

This year's death toll exceeds the previous record set in 2022 by 71 percent. The 2022 study counted 29,480 heat-related deaths. Authors note that the current figures likely understate the true impact. The analysis excludes a deadly heat wave in May and covers cities home to only 40 percent of Europe's population.

Italy, France, Spain, and Germany recorded the highest number of deaths. More than half of the victims were aged 85 or older. However, the heat also killed more than 800 people between the ages of 20 and 44.

Garyfallos Konstantinoudis, a co-author and biostatistician at Imperial College London, said about one-third of the deaths occurred between June 17 and July 1. During that span, temperatures averaged 5.3 C above normal.

Lead author Clair Barnes, a climate scientist at Imperial College London, stated that Europe is now 2.5 C hotter than pre-industrial times. She explained that infrastructure in Western and Northern Europe was not designed for the temperatures now driven by human-caused warming. Barnes noted that the share of heat deaths linked to warming has risen from about 45 percent in the early 2000s to 65 percent today.

The team used computer simulations to compare actual deaths against a hypothetical world without climate change. They validated their statistical models against government estimates. For the May and June heat waves in Britain, the model predicted 2,700 excess deaths, while the UK health statistics agency reported 2,800. Outside experts, including Dr. Howard Frumkin and Dr. Courtney Howard, endorsed the methods and called for better adaptation strategies alongside emission cuts.