As a punishing heatwave grips large parts of Europe, with thermometers surpassing 40°C in several regions, the World Health Organization’s regional director for Europe, Hans Kluge, has issued a stark warning: governments must treat extreme heat as a health emergency and bolster their healthcare systems accordingly.
In a post on X on Monday, Kluge wrote: “Recognise extreme heat as a health crisis and act before temperatures peak.” He added that preparedness must be operational: “freeing beds, protecting high-risk patients, securing cooling, checking backup power and supporting health workers.”
The call comes after thousands of excess deaths have been linked to the ongoing heatwave across the continent. Older adults, people with chronic conditions, and those without access to adequate cooling are particularly vulnerable. The situation has exposed gaps in health system readiness that experts say will only widen as climate change makes such events more frequent and intense.
Hospitals Under Strain from Paris to London
In France, emergency rooms have reported a fourfold increase in heat-related conditions such as heatstroke, dehydration, and hyponatremia. The spike has placed additional pressure on services already stretched by summer staffing shortages and ongoing recovery from the pandemic.
Across the Channel, the London Ambulance Service described last Friday as its busiest day on record, responding to 8,869 emergency calls. Several NHS hospitals declared critical incidents after cooling failures disrupted medical equipment, operating theatres, and wards. The breakdowns compounded the challenge of managing patients suffering from heatstroke, dehydration, and exacerbations of chronic illnesses among the elderly.
The UK’s experience mirrors a broader trend: as Copernicus warns of 'extremely unusual' heatwaves with no immediate relief, health systems from Madrid to Berlin are scrambling to adapt. In Spain, the meteorological agency AEMET has forecast a return to extreme heat across most of the country this weekend, raising concerns about further strain on emergency services.
Kluge’s remarks underscore a growing consensus among public health officials that heatwaves are no longer a seasonal inconvenience but a systemic threat requiring permanent infrastructure and policy responses. The WHO Europe chief has previously highlighted the need for urban planning changes, such as green spaces and reflective building materials, to mitigate the urban heat island effect.
The health impacts extend beyond direct heatstroke. Research has shown that extreme heat alters brain chemistry and fuels aggression, potentially increasing violence and mental health crises. Meanwhile, rising sea temperatures are driving outbreaks of flesh-eating bacteria in coastal waters, a phenomenon documented from the Baltic to the Adriatic.
For now, Kluge’s message is urgent and practical: governments must not wait for the next heatwave to act. “Heat preparedness must be operational,” he insisted, calling for immediate measures to protect the most vulnerable and ensure that health workers have the resources they need.
The European Commission has yet to issue a formal response, but the European Environment Agency has repeatedly warned that without accelerated adaptation, heat-related deaths could triple by mid-century. As the continent swelters, the question is whether political will will match the scale of the threat.
