Period of Overly Hot Weather Conditions
This page is the CodyCross answer for the clue below from Underground Worlds, Group 2179, Puzzle 2 (Cennet and Cehennem).
Question is: Period of Overly Hot Weather Conditions
and the answer is: HEATWAVE
Word Meaning:
HEAT WAVE — (idiomatic) A period of exceptionally hot weather.
Definitions from Wiktionary.