Why do you write about the terrible scene when the rain comes at the beginning?

Create a tense atmosphere, hint at the plot, and portray the characters.

1. Create a tense atmosphere: Set a tense and uneasy atmosphere for the story by describing severe weather conditions, such as heavy rain, thunder, lightning, etc.

2. Implied plot: Heavy rain and other severe weather are often related to certain plots or events.

3. Characterization: By describing the protagonist's reaction and behavior in the rainstorm, their personality characteristics can be portrayed.