France heatwave estimate update: excess mortality for June 17–July 2

France’s public-health agency, Santé publique France, published an updated excess-mortality estimate for the June 17–July 2, 2026 heatwave period. The bulletin was released July 22 and is still preliminary/unconsolidated, based on mortality data as of July 20—but it shows heat as an operational public-health and emergency-planning challenge, not just a weather event.

What changed in France’s excess-mortality numbers

Santé publique France says 92 departments were affected, covering 98.5% of the population of mainland France. Across those departments, it estimates at least 5,764 excess deaths from all causes (+36.2%) on heatwave-affected days, based on 21,674 observed deaths versus 15,910 expected deaths. More than half of the excess deaths (56%) occurred between June 25 and June 27.

The age pattern is a central part of the update: the bulletin reports an “unprecedented” excess in all-cause mortality across age groups aged 15 and older, with people aged 75 and older accounting for two-thirds of the preliminary toll—at least 3,719 excess deaths (+33.3%).

Where the pressure showed up, the agency reports all regions were affected by excess all-cause mortality except Corsica, Occitanie, and Provence-Alpes-Côte d’Azur. The region most affected was Île-de-France, with 1,999 excess deaths (+81.2%). And it says all-cause deaths increased across hospitals, homes, and nursing homes/retirement homes.

How to read “excess all-cause mortality”

Excess all-cause mortality compares deaths observed during a specific period to the deaths expected based on prior patterns. It’s used because cause-of-death coding can lag during fast-moving events—so excess mortality can capture the overall mortality pressure even when individual “heat-caused” attribution is incomplete. But it is not a finalized, heat-only death count, and it can reflect other factors occurring during the same window.

Who is at highest risk in heat-health terms

In the French update, the clearest risk signal in the numbers is older age: people 75+ account for two-thirds of the preliminary excess toll. WHO also highlights why that matters operationally: it says people with chronic diseases that take daily medications have greater risk of complications and death during a heatwave, as do older people and children, and that serious effects can appear suddenly.

Why WHO/Europe links heat to health-security planning

WHO/Europe frames extreme heat as a growing public-health threat and a health security challenge expected to hit harder each year. The release emphasizes that heat can drive an influx of health-care admissions and place sudden pressure on essential services, including failures related to power and cooling. It also points to how urban heat-island effects can intensify hospital pressure.

Importantly, WHO’s broader preparedness guidance is consistent: it describes contingency plans that map risks, vulnerable populations, and available capacities; it includes early warning systems; and it stresses ensuring vulnerable populations in settings like health facilities, nursing homes, and schools have adequate cooling equipment.

What readers should watch next

The Santé publique France bulletin is an early read based on data as of July 20, and the update can change as estimates are consolidated. For residents and local emergency planners, the key takeaway is to treat heat readiness as a system-planning job: update heat-health action plans, confirm cooling access for higher-risk groups and vulnerable settings, and ensure health and long-term care services can keep operating when heat spikes.

What to monitor: whether France publishes further revisions once data are consolidated, and whether countries continue strengthening heat–health action planning guidance and implementation in parallel with the next heat season.

Sources

• Santé publique France: excess mortality for June 17–July 2 heatwave (updated bulletin)
• WHO/Europe: “Planning for a warmer world” (July 16, 2026)