жарища

scorching heat, terrible heat

жар fever + ищ augmentative, often pejorative + а Feminine singular
noun · singular feminine Rare #51,191
scorching heat, terrible heat Colloquial and emphatic; expresses strong discomfort from the heat.
RU: Сегодня такая жарища!
EN: It’s scorching hot today!

Ну и жарища!

It's so hot!

— Жизнь прекрасна (1997)

Ну и жарища.

It's sweltering.

— Afonya (1975)

Здесь такая жарища!

It's so hot here!

— Ветер крепчает (2013)

Ну и жарища, просто мерзость!

It's so hot, it's just disgusting!

— Развод по-итальянски (1961)