Heat killed an estimated 50,391 people in Europe's cities this summer, the deadliest summer on record for heat deaths, according to two peer-reviewed studies published in the journal Nature Health and reported by The Guardian on Friday. Researchers at Imperial College London and the London School of Hygiene and Tropical Medicine modelled heat-related deaths across 854 urban areas in 30 European countries between June and August.
Source: The Guardian
About two-thirds of the deaths — 32,619 people — were attributed by the researchers to the extra heat caused by human-caused climate change, mainly the burning of coal, oil and gas, the Associated Press reported. The total is 71 per cent higher than the previous deadliest summer in the same cities, 2022, when an estimated 29,480 people died.
Source: Associated Press via Jammu News Portal
The figures are statistical estimates built from temperature records and the historical relationship between heat and mortality, not counts from official death certificates. The 854 cities covered hold about 173 million people — roughly 40 per cent of the population of the 30 countries, which are the 27 European Union member states plus the United Kingdom, Norway and Switzerland. The authors said the true toll is likely higher, because the studies do not count a deadly heatwave in May and cover cities only.
One heatwave, one-third of the deaths
About one-third of the deaths occurred during a single intense heatwave from June 17 to July 1, when temperatures ran about 5.3 degrees Celsius above normal, study co-author Garyfallos Konstantinoudis of Imperial College London said. Some cities saw temperatures as much as 12 degrees Celsius warmer than usual. It was western Europe's hottest summer on record, and furnace-like conditions fuelled the largest wildfires in modern history in France and Spain, displacing about 300,000 people.
People died at the highest rates in Malta, Italy and Hungary, The Guardian reported, with existing health problems, loneliness and poverty making the heat more deadly. Morgues and funeral homes filled from June to August as hot days pushed vulnerable bodies into overdrive and warm nights prevented recovery.
"These numbers are a stark reminder that our hotter, more extreme summers are having an increasingly severe impact on public health," said lead author Clair Barnes of Imperial College London. She said much of western and northern Europe's housing and infrastructure is not designed for the temperatures now being seen.
50,391 estimated heat deaths in 854 European cities, June–August 2026. 32,619 attributed to human-caused climate change. Previous deadliest summer: 29,480 deaths in 2022. About one-third of deaths came in the June 17–July 1 heatwave alone.
What is solid
- Two peer-reviewed studies in Nature Health, led by Imperial College London and LSHTM researchers, estimate 50,391 heat deaths in 854 cities across 30 European countries in June–August 2026.
- The researchers attribute about two-thirds of the deaths (32,619) to extra heat from human-caused climate change.
- The estimate is 71% higher than the same team's figure for 2022 (29,480), the previous deadliest summer in these cities.
What is only claimed
- The 50,391 figure is a modelled statistical estimate, not a count from official death records, so the exact toll cannot be known precisely.
- The share blamed on climate change depends on computer models comparing this summer with a hypothetical world without fossil-fuel warming.
The findings land just weeks before world leaders gather in Turkiye for the annual UN climate talks, and days after a UN report warned that the chance of limiting global warming to 1.5 degrees Celsius above pre-industrial levels has now vanished, according to coverage of the studies. Barnes warned that without faster action and coordination, heat deaths will keep rising.