Europe's Early Heat Wave Caused Over 10,000 Excess Deaths

Europe experienced a significant spike in excess mortality, with well over 10,000 additional deaths recorded during an exceptionally early and intense heat wave in late June 2026. This figure represents the difference between the expected number of deaths and the actual number, with the peak occurring when parts of the continent faced record temperatures. Experts caution that the full impact may take time to ascertain, as many heat-related fatalities, such as heart attacks exacerbated by heat, may not be formally attributed to the heat wave on death certificates.

The EuroMOMO mortality monitoring hub, which aggregates data from twenty-four European countries, estimated 14,260 excess deaths from all causes during the week ending June 28, 2026. Of these, more than 12,000 occurred among individuals aged 65 and older, out of a total of 84,583 deaths recorded that week. Mortality rates in the weeks immediately before and after this period were considerably lower. Lasse Vestergaard of Denmark’s Statens Serum Institut, coordinating EuroMOMO, stated that the heat wave is the most probable cause for this substantial excess mortality, as no other clear explanation is apparent for such a high figure occurring simultaneously across multiple countries.

This surge in excess deaths during a single week is described as "highly unusual." While Europe has seen thousands of heat-related deaths in recent years, the year 2003 remains the deadliest, with approximately 70,000 fatalities attributed to heat. The increasing frequency and intensity of heat waves are linked to climate change, driven by the combustion of fossil fuels such as coal, oil, and gas. The data suggests a concerning trend of heat-related mortality, particularly impacting vulnerable populations like the elderly.