Correct

炎暑

/ yán shǔ /
Strokes

Example

As a Noun

hot summer; sweltering summer days; dog days

1
Yánshǔ
炎暑
zhì
  

Blazing hot summer has come.

As a Noun

(summer) heat

2
Yánshǔ
炎暑
rén
  

The summer heat is oppressive/stifling.