France saw at least 5,700 more deaths than normal during a historic heat wave in June, according to the country’s public health agency. The latest figure points to a much heavier human toll from the extreme temperatures than earlier estimates suggested.

Health officials said the updated total sharply increases the expected impact of the heat event. The new assessment underscores growing concern about how periods of record heat can lead to a rise in deaths, especially during unusually intense weather episodes.

The revised estimate highlights the broader health risks tied to extreme heat, which can strain vulnerable groups and put pressure on health systems. Public health authorities have increasingly warned that prolonged high temperatures can become deadly when they affect large parts of the population at once.

The France heat wave death estimate is likely to add to wider debate in Europe over heat preparedness, climate resilience and public safety during the summer months. With officials linking thousands of excess deaths to the June event, the scale of the impact is now coming into clearer focus.