# Rising heat-related mortality in Europe > Live situation record from CLSTR: https://clstr.news/situations/rising-heat-related-mortality-in-europe > Updated: 2026-09-23T19:46:48.000Z. Sources: 7. Developments: 2. Data from England, Wales, and Spain indicate rising trends in mortality linked to extreme temperatures. In England and Wales, long-term statistics from the Office for National Statistics show that while cold-related deaths historically outnumber heat-related deaths, the gap is narrowing. In May and June 2026, an estimated 2,877 heat-related deaths occurred, with London recording the highest number of fatalities specifically linked to hot days. In Spain, mortality monitoring systems report significant increases in heat-related deaths. Galicia has seen a decade-high number of heat-attributed deaths in September 2026, surpassing the previous record set in 2023. In the Basque Country, the average number of daily heat-related deaths rose from 1.01 in 2025 to 3.78 in 2026, with 409 deaths recorded between mid-May and late August. Officials noted that women and individuals over the age of 85 are disproportionately affected. Meteorological agencies have described the period as a “four-month summer” due to the persistence of high temperatures into September. ## Timeline ### 2026-09-23: Heat-related deaths rise significantly in Galicia and Basque Country Heat-related mortality has surged in Spain, with Galicia seeing record September deaths and the Basque Country reporting a nearly fourfold increase in daily heat-attributed deaths compared to last year. 5 sources. https://clstr.news/cluster/heat-related-deaths-rise-significantly-in-galicia-and-basque-country ### 2026-09-01: Temperature-related mortality trends in England and Wales Recent data shows a narrowing gap between cold and heat-related deaths in England and Wales, with London experiencing the highest number of fatalities during hot days due to factors like the urban heat island. 2 sources. https://clstr.news/cluster/temperature-related-mortality-trends-in-england-and-wales --- Cite as: Rising heat-related mortality in Europe. CLSTR, https://clstr.news/situations/rising-heat-related-mortality-in-europe