Early Heatwave Sweeps France as Temperatures Could Reach 40°C by the Solstice

Overview

• The heatwave that began on Wednesday, June 17 has placed 50 departments on yellow vigilance and meteorologists expect the affected area to grow to about 69 departments with a probable shift to orange alerts from Thursday.
• Forecasters say the event is a dynamic 'vague de chaleur' driven by warm air from the south‑west rather than a stationary heat dome, a pattern that raises both peak daytime temperatures and the chance of locally severe storms.
• Authorities have allowed local postponements of oral baccalauréat exams, Paris opened a supervised bathing zone on the Canal Saint‑Martin and firefighters deployed an aerial water‑bombing helicopter to fight new fires in the Allier department.
• Dry soils and ongoing drought are worsening stress on crops and livestock, limiting irrigation reserves and increasing wildfire risk across several regions as temperatures climb toward 40°C at the weekend.
• This is the 52nd recorded heatwave in metropolitan France since 1947 and experts link the rising frequency and intensity of such early‑season episodes to long‑term climate change, with officials warning of a prolonged, high‑impact spell through the solstice.