Paris and the 15 other departments would move up to the red alert level, a warning last issued in August 2023, due to the severity of temperatures, Meteo France said.

It said 68 other departments would remain on orange, the second highest alert level.

Meteo France said that the heatwave requires particular vigilance due to its "duration, geographic extent, and intensity".

The peak heatwave in the Paris area will be "very severe on Tuesday and the night of Tuesday to Wednesday", it added.

Meteo France said temperature highs of up to 41 degrees Celsius were to be expected Tuesday in some of the areas designated with a red alert.

Temperatures would freshen up Wednesday evening around Paris, with hot weather persisting around the Mediterranean.