Why was it hotter than usual before the typhoon came?

Typhoon is a tropical cyclone, and cyclone is a low pressure.

Due to thermal expansion and contraction, air rises rapidly. The higher the temperature, the more it rises.

A low pressure center is formed when there is less air on the ground. The typhoon is very low.

pressure center

What I have summarized above is easy to understand, because it is good for students to learn the principles of understanding.

There are too many technical terms in the encyclopedia to understand.