Météo France issued a critical weather warning on Saturday afternoon, June 20. Thirty-five departments are scheduled to be placed under red alert for extreme heat on Sunday, June 21. This widespread alert affects more than 26 million residents across the country. The meteorological service warns of intense temperatures expected throughout the affected regions. Authorities are monitoring the situation as the heatwave intensifies. This represents a significant escalation in the weather alert levels. Residents are advised to take necessary precautions against the extreme heat.