In French there are two very similar expressions for extremely hot weather: une vague de chaleur (heatwave), and la canicule (oppressive heat). There are some technical differences between the two, as you will discover in this video.
Matches in Transcript
Caption 15 [fr]: Premièrement, c'est une période avec une moyenne de température élevée de jour comme de nuit, Caption 15 [en]: Firstly, it's a period with an above-average daytime and nighttime temperature,
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