Europe is in the grip of an unprecedented early-summer heatwave that has already claimed around 1,000 excess lives in France, broken all-time temperature records across several countries and left nearly
191 million people exposed to temperatures of 35°C or higher.
From railway tracks buckling under intense heat to nuclear power plants cutting electricity production and hospitals overflowing with patients suffering heatstroke and dehydration, the crisis has highlighted how extreme heat has become one of the continent’s biggest public health and infrastructure challenges.
Scientists say this is no longer an isolated weather event. Instead, it is part of a worrying trend driven by climate change, with Europe warming faster than any other continent.
France Reports Around 1,000 Excess Deaths
France has borne the brunt of the heatwave. According to French public health authorities, the country recorded approximately 1,000 excess deaths during the first week of the heatwave. “Excess deaths” refer to the number of people who died above what would normally be expected during the same period based on historical averages. Unlike official heatstroke fatalities, excess mortality captures the broader impact of extreme temperatures, including deaths caused by heart attacks, strokes, respiratory illnesses, kidney failure and worsening chronic diseases triggered by prolonged exposure to heat.
During the worst days of the heatwave, France recorded over 1,400 deaths per day, compared to the seasonal average of 900–1,000 daily deaths.
Health officials said nearly 90 per cent of the victims were aged 65 years or older, although younger people with pre-existing medical conditions were also affected. Many died inside their homes rather than in hospitals, highlighting one of the biggest dangers of heatwaves – they often kill silently.
The World Health Organization (WHO) estimates that more than 1,300 excess deaths have occurred across Europe since June 21, with the number expected to rise as mortality data from other countries is compiled.
Temperatures Cross 40°C Across Europe
The scale of the heatwave has been extraordinary. Countries that rarely experience temperatures above 35°C have recorded all-time highs.
Among the records:
- Germany: 41.7°C in Coschen – the highest temperature ever officially recorded in the country.
- Czech Republic: 41.9°C in Doksany – a new national record.
- Poland: 40.5°C, breaking a record that had stood for more than a century.
- Hungary: 40.7°C, its hottest day on record.
- Parts of France, Italy, Austria, Slovakia, Croatia and Serbia also crossed the 40°C mark.
Meteorologists note that daytime temperatures are only part of the problem.
Night-time temperatures in several cities remained above 25°C, a phenomenon known as “tropical nights.” Without cooler nights, the human body gets little chance to recover from daytime heat, significantly increasing the risk of illness and death.
Nearly 191 Million People Under Heat Alerts
According to forecasts compiled by AFP, about 191 million Europeans were expected to experience temperatures of at least 35°C over the weekend.
Schools in some regions shortened schedules, while local authorities opened cooling centres in public buildings and community halls.
Hospitals Are Seeing a Surge in Heat Emergencies
Emergency departments across France, Germany, Italy and several Central European countries have witnessed a sharp rise in patients suffering from heatstroke, heat exhaustion, severe dehydration, kidney complications, cardiovascular emergencies, and respiratory distress.
Doctors say the elderly are particularly vulnerable because ageing reduces the body’s ability to regulate temperature. Many medications for blood pressure, heart disease and mental health conditions also make it harder for the body to cope with extreme heat.
Railways and Roads Are Feeling the Heat
The effects of the heatwave are visible across Europe’s transport network. Steel railway tracks expand when temperatures rise sharply. If they expand too much, they can buckle, increasing the risk of derailments. Rail operators in several countries have therefore imposed speed restrictions and delayed services to ensure passenger safety.
Road infrastructure has also suffered. Asphalt softens under prolonged exposure to temperatures above 40°C, leading to cracked roads, damaged surfaces and traffic disruptions. Construction workers in several cities have been forced to suspend outdoor work during the hottest hours of the day.
Nuclear Power Plants Face Cooling Problems
The heatwave has even affected Europe’s electricity supply. France generates around two-thirds of its electricity from nuclear energy. Most nuclear reactors rely on river water to cool their systems before returning the water to rivers.
However, prolonged heat has caused river levels to fall while water temperatures have risen significantly. Environmental regulations limit how much warm water can be discharged back into rivers because it can damage aquatic ecosystems.
As a result, several reactors have reduced electricity generation just as electricity demand has surged because millions of households are using air conditioners and cooling systems.
Wildfires Spread Across Europe
Extreme heat, dry vegetation and gusty winds have created ideal conditions for wildfires. Germany has battled multiple forest fires, particularly in former military training grounds where unexploded World War II ammunition has made firefighting extremely dangerous.
Wildfire risks have also increased in parts of France, Italy, Croatia and the Balkans, with authorities deploying additional firefighting aircraft and emergency crews.
Scientists warn that hotter, drier summers are lengthening Europe’s wildfire season each year.
Farmers Feel The Heat
Agriculture is another casualty. High temperatures increase evaporation, dry out soils and reduce water availability for crops. Farmers across parts of France, Germany and Central Europe have reported concerns over wheat, maize and sunflower crops, while livestock farmers are struggling to keep animals cool.
Reduced crop yields could place additional pressure on food prices already affected by recent climate-related disruptions.
Tourism Takes a Hit
Europe’s summer tourism industry is also under pressure.
Outdoor attractions have shortened operating hours, guided walking tours have been cancelled during afternoons and many cities have advised tourists to avoid sightseeing between noon and early evening.
Visitors to popular destinations such as Paris, Rome and Prague have increasingly shifted towards museums, shopping centres and other air-conditioned spaces.
Why Europe Is Warming Faster
According to the WHO and the European Environment Agency, Europe is the fastest-warming continent, with temperatures rising at roughly twice the global average.
Several factors contribute to this rapid warming, including changes in atmospheric circulation, shrinking snow cover, warming seas and the broader effects of greenhouse gas emissions.
Climate attribution studies suggest that human-induced climate change has made heatwaves like the current one **up to 200 times more likely** than they would have been in a pre-industrial climate.
Scientists also warn that the duration, frequency and intensity of heatwaves are increasing. What was once expected to occur once every few decades is now becoming a near-annual event.
Europe has experienced devastating heatwaves before.
The 2003 heatwave remains the deadliest in modern European history, killing an estimated 70,000 people across the continent, including nearly 15,000 in France alone.
Subsequent heatwaves in 2010, 2019, 2022 and 2025 also claimed thousands of lives, prompting governments to introduce heat-health warning systems and cooling centres.
Yet the latest crisis demonstrates that despite improved preparedness, extreme heat continues to pose a major threat.
