Germany records 14,000 heat-related deaths, prompting calls for constitutional climate reforms

Official data released on Thursday indicates that Germany has recorded approximately 14,000 heat-related deaths this summer, a figure that significantly exceeds the previous record high of 8,900 deaths recorded in 2018. The Robert Koch Institute reported that the mortality spike was driven by a series of punishing heatwaves, with around 9,600 of the fatalities occurring in a single week in late June when temperatures exceeded 40°C.

The institute noted that the over-75 age group accounted for the largest share of these deaths. The report clarified that while some deaths result directly from heatstroke, most are caused by a combination of heat exposure and pre-existing medical conditions. Consequently, heat is rarely listed as the underlying cause on death certificates, necessitating the use of statistical methods to estimate the true extent of heat-related mortality.

The crisis is not isolated to Germany. Across Europe, heatwaves have driven a significant spike in mortality. Spain’s public health institute registered nearly 4,500 heat-related deaths since 1 June, while French health authorities reported more than 7,300 excess deaths over the same period. In Germany, the extreme heat and drought have also fuelled wildfires, reduced crop yields, and lowered water levels in major rivers used for cargo shipping.

In response to the data, ministers from the centre-left Social Democrats (SPD), who are junior coalition partners to Chancellor Friedrich Merz’s conservative government, have urged constitutional changes. They are calling for the Basic Law to explicitly mandate "climate adaptation and nature conservation." SPD Environment Minister Carsten Schneider stated that the climate crisis is now a "tangible reality," but current legislation limits the ministry’s ability to assist states and local governments in responding to the threat.

The SPD ministers have also called for changes to urban planning legislation, building codes, and labour laws to address working conditions in high temperatures. Former Health Minister Karl Lauterbach supported the push, arguing that municipalities require financial support to adapt to a changing climate. He noted that many local governments are heavily in debt and cannot independently finance the necessary protective measures.

The German Association of Towns and Municipalities has estimated that a minimum of 20 billion euros is required to adapt hospitals and nursing homes to scorching temperatures. President Ralph Spiegler highlighted that many facilities lack air conditioning, which is essential for both patients and staff. Lauterbach further suggested that the official figures may underestimate the true toll, as the Robert Koch Institute employs a "rather conservative methodology" that may not fully capture deaths where heat contributed to conditions such as strokes.