We went to the pool to beat the heat.

In the midday heat of summer, he continued to work while drenched in sweat.

Do you understand the necessity of this project?

That information is unnecessary.

That information is completely unnecessary.

He thinks that war is a necessary evil.

I stayed up late every night and ended up ruining my health.

He continued his work overnight.

He is always working at night.

The sound of the night rain hits the window glass.