21,674 Deaths Recorded During France's Heatwave Period As Excess Mortality Hits 5,764

A devastating heatwave that swept across France in late June has left 5,764 excess deaths, according to updated data released by the country’s public health agency, offering one of the clearest signs yet of the mounting health risks posed by extreme temperatures in Europe.

The revised analysis shows that 21,674 people died between June 17 and July 2, compared with the 15,910 deaths normally expected during the same period  a 36% rise in mortality.

Health officials said the figures are based on “excess deaths”, a statistical measure used to estimate the overall impact of an event by comparing actual deaths with historical averages.

While not every death was directly caused by heatstroke, experts say prolonged exposure to extreme heat likely worsened

pre-existing heart, lung and kidney conditions, leading to a sharp rise in fatalities.

How France Calculated The Heatwave Death Toll

•  Excess deaths recorded: 5,764

•  Actual deaths (June 17 July 2): 21,674

•  Expected deaths for the period: 15,910

•  Increase over normal mortality: 36%

The revised figure is based on complete mortality data and is significantly higher than the preliminary estimate of around 2,000 excess deaths released earlier this month.

Who Was Hit The Hardest?

The heatwave proved particularly deadly for older adults, with the elderly accounting for the overwhelming majority of fatalities.

Key findings:

•  Nearly two-thirds of the excess deaths were among people aged 75 years and above.

•  Almost half of all deaths occurred in hospitals.

•  The remaining fatalities were reported from nursing homes and private residences.

•  The Paris (Île-de-France) region recorded nearly 2,000 more deaths than expected, making it the worst-affected area in the country.

Deadliest Days Of The Heatwave

The most severe impact was seen over a three-day period when temperatures reached their highest levels across France.

Between June 25 and June 27:

• Temperatures peaked across much of the country.

•  Mortality surged sharply during these days.

•  Hospitals and emergency services faced increased pressure as vulnerable people struggled to cope with the extreme heat.

Why Heatwaves Turn Deadly

Unlike floods, storms or wildfires, heatwaves often become fatal in less visible ways.

Extreme temperatures can:

• Cause dehydration and heat exhaustion.

• Put severe strain on the heart and lungs.

• Worsen chronic illnesses such as cardiovascular, respiratory and kidney diseases.

• Increase the risk of death among elderly people and those with existing medical conditions.

Health experts say many victims never suffer classic heatstroke but instead die from complications triggered by prolonged exposure to high temperatures.

Europe’s Climate Challenge Is Growing

France’s latest figures come as several parts of Europe continue to experience prolonged periods of unusually high temperatures. Scientists have repeatedly warned that climate change is making heatwaves more frequent, longer-lasting and more intense across the continent.

Although European countries strengthened heat-health warning systems after the 2003 heatwave, which claimed more than 70,000 lives, the latest mortality data suggests extreme heat remains one of the region’s most serious public health threats.

The updated figures from France serve as another reminder that heatwaves are no longer isolated weather events. Increasingly, they are emerging as one of Europe’s deadliest consequences of a warming climate.