Germany’s 5,120 heat deaths: What the numbers reveal
The Robert Koch Institute estimates that around 5,120 people died due to heat in Germany through June 28, 2026, with most occuring in the final week of June. Experts explain that this figure is a statistical estimate based on temperature and mortality data, not a direct count.
Heat-Related Death Statistics
A heatstroke begins with headaches, dizziness, and loss of awareness. The body's temperature regulation fails, causing body temperature to rise to life-threatening levels, potentially leading to multiple organ failure and death. However, doctors rarely record deaths directly attributable to heat. Germany's Federal Statistical Office reports an average of 21 such cases per year from 2004 to 2014.
The Robert Koch Institute (RKI) published an estimate of 5,120 heat-related deaths in 2026 through June 28. This is not a direct count but a statistical estimate, according to Alexandra Schneider, an epidemiologist at Helmholtz Munich. The estimate was derived by comparing mortality data from the Federal Statistical Office with temperature data from the German Weather Service.
Methodology Behind the Estimate
In the final week of June, approximately 23,600 people died. The weekly average temperature (day and night) was 26°C. The RKI assumes heat-related deaths occur from a weekly average temperature of 20°C onward. The number of deaths was nearly 30% higher than the average for comparable periods in previous years (around 18,200). Researchers modeled how many deaths would have occurred if temperatures had not exceeded 20°C, adjusting for confounding factors. The result: 5,120 heat-related deaths, with 4,310 in the final week of June alone.
Schneider considers the estimate plausible. She had previously criticized the RKI's methodology because weekly averages can smooth out extreme fluctuations and lead to underestimation. However, this time the heat was consistently high, making the estimate reliable.
Cold-Related Mortality and Climate Change
Cold-related deaths, like heat-related ones, are estimates based on statistical links. In colder months, respiratory illnesses increase, and cold contributes to cardiovascular diseases, just as heat does. In Europe, cold-associated mortality is still far higher than heat-associated mortality, but a slow shift is occurring. Studies on climate change scenarios show that regardless of the scenario, the net number of deaths increases because the rise in heat-related deaths outweighs the decline in cold-related deaths.
Heat's Impact on Health and Emergency Services
Schneider notes that focusing solely on heatstroke as a cause of death would massively underplay heat's impact. Studies have shown a strong link between heat and heart attacks, and nighttime heat increases stroke risk.
Jonas Sonnenstuhl, a paramedic in Teltow, Brandenburg, says that conditions like strokes and heart attacks become more frequent and can become life-threatening more quickly. He recalls a 17-year-old patient with a congenital heart defect who called emergency services during the heatwave, experiencing shortness of breath, dizziness, and impaired consciousness. The heat also stressed emergency responders and hospital staff. On June 28, during a 24-hour shift, the temperature inside the ambulance did not drop below 30°C. Many emergency departments lack air conditioning. Both paramedics and hospital staff were pushed to their physical limits.
