It’s a real scorcher! (scorch - burn a surface)
It’s hot as hell!
It’s boiling hot!
It’s ridiculously hot!
It’s sweltering! (swelter - be uncomfortably hot)
We’re having a heatwave!
It’s wicked hot! (wicked - extremely unpleasant)
It’s like a furnace outside!
It’s hotter than blazes.
You could fry an egg on the sidewalk.
You could fry an egg on the hood of that car.
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