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Heatwave

//ˈhitˌweɪv// noun

Noun

1
Alternative spelling of heat wave (“period of exceptionally hot weather”) alt-of, alternative
"Various parts of the world have been experiencing heatwaves and on Thursday the EU’s climate monitoring service said the world had experienced its hottest June on record last month. […] In parts of China, an enduring heatwave has continued, with temperatures reaching above 35C."
2
A heat haze.
"On a hot summer's day, one can literally see heatwaves shimmering off the surfaces of inanimate objects."

From heat + wave.

Unscramble this word: heatwave