More than 5,100 people in Germany have died from heat-related causes in 2026 up to the end of June, according to an estimate published by the Robert Koch Institute (RKI).

This figure is derived from a statistical correlation comparing death records collected by Germany’s Federal Statistical Office with temperature trends measured by the German Weather Service. The weekly average temperature during this period was 26 degrees Celsius.

Direct attribution of deaths to heat is rare; between 2004 and 2014, an average of only 21 such cases were officially recorded annually by the Federal Statistical Office. Meteorologist and epidemiologist Alexandra Schneider, deputy director of the Institute of Epidemiology at Helmholtz Munich, explained that despite modeling various scenarios, all indicate an increase in total deaths due to heat. This increase is significant enough that it cannot be offset by any decline in cold-related mortality.

The report also notes that using weekly average temperatures may underestimate deaths if temperatures fluctuate sharply within a week. While cold-associated mortality remains higher than heat-associated mortality in Europe, the consistent heat in 2026 has led to a notable rise in heat-related deaths.

The challenge remains in conclusively proving that specific deaths were caused by soaring temperatures. For example, during the heatwave, emergency services responded to a 17-year-old patient with a congenital heart defect, illustrating the health risks posed by extreme heat.

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