Germany recorded an estimated 14,000 heat-related deaths this summer, official data showed, surpassing the previous record of 8,900 deaths set in 2018, according to the Robert Koch Institute. Around 9,600 of those deaths occurred in a single week in late June when temperatures crossed 40°C in parts of the country. The institute said the largest share of victims were aged 75 and above, with more than 10,000 of the estimated deaths in that age group.
The figures emerged as Europe struggled through a series of punishing heatwaves and drought that have fuelled wildfires, reduced crop yields, and lowered water levels in major rivers used for cargo shipping in Germany. Elsewhere, Spain's public health institute registered nearly 4,500 heat-related deaths since June 1, while French health authorities reported more than 7,300 excess deaths over the same period. These numbers are not directly comparable because countries use different methods and reporting periods, but together they point to a spike in heat-related mortality in the worst-hit countries. Across Europe, fires have devastated forests and forced evacuations, with more than 576,000 hectares burned by mid-August.
Heat deaths often hidden
The Robert Koch Institute explained that in most cases, death results from a combination of heat exposure and pre-existing medical conditions, so heat is not usually listed as the underlying cause on death certificates. Instead, statistical methods must be employed to estimate the extent of heat-related deaths. In some cases, such as heatstroke, exposure to heat leads directly to death. The institute noted that differences in annual figures can be attributed to the varying severity of the heatwaves; for instance, it recorded 8,900 heat-related deaths in 2018, dropping to 2,000 or below in years like 2016.
Former health minister Karl Lauterbach, a member of the Social Democrats (SPD), argued that the institute's methodology is rather conservative, suggesting the true number of deaths is likely underestimated. He cited an example where high heat stress can contribute to a stroke developing from pre-existing atrial fibrillation, and without the heat it might not have happened.
Calls for climate adaptation
This week, ministers from the centre-left SPD, junior coalition partners to Chancellor Friedrich Merz's conservatives, said Berlin must enshrine the need for "climate adaptation and nature conservation" in the German constitution, the Basic Law. Environment Minister Carsten Schneider said the climate crisis is now a "tangible reality" but current law limits what his ministry can do in response, including in helping states and local governments. The group of ministers urged changes to urban planning legislation and building codes, and new labour laws to address working in high temperatures.
Lauterbach supported the push for municipalities needing financial help, saying "Effective heat protection costs a lot of money." The German Association of Towns and Municipalities argued that billions are needed to help hospitals and nursing homes, often lacking air-conditioning, adapt to scorching temperatures. Its president, Ralph Spiegler, said "Hospitals need air conditioning – not only for patients but also for staff" and estimated an investment need of at least 20 billion euros.
A warning beyond Europe
The death toll has been framed as a warning that extends beyond the continent. In an editorial, The Express Tribune wrote that reducing greenhouse gas emissions is the only way to limit the longer-term escalation of global temperatures, but prevention has limits when extreme conditions are becoming more frequent and severe. "It is no longer enough to issue warnings once temperatures have already risen," the outlet argued, calling for a rethink of what constitutes essential infrastructure in a warming climate. "The real test of climate preparedness is not whether governments can accurately forecast a heatwave. It is whether that forecast triggers enough action to prevent people from dying."