Since mid-June 2026, France has experienced three separate nationwide heatwave periods: 14 days in June + 16 days in July + 22 days from late July into August = 52 cumulative heatwave days This does not mean France remained under uninterrupted heatwave conditions for 52 consecutive days. The figure represents the combined duration of three separate heatwave episodes, with short periods of relief between them. For petrochemical heaters, boilers, steel mills, glass plants, ce