Well, in such fanfiction, when the thunder breaks, it might cause a power surge in the magic, leading to unexpected challenges for the characters. Or, it could be a sign of an approaching dark force.
Dao Mei's new drama,'When It Rains,' will be broadcast in 2023. This drama was the third collaboration between the Taoist girl and Mario Maurier. The plot was not too melodramatic, but it showed a slightly sad and heavy love story of catching a horse. The specific broadcast time had not been mentioned.
The novel I recommend to you is Red Dust Immortal Emperor. It's a modern romance novel about urban life. The main character, Wang Chen, was attracted by the Nine Heavens Divine Thunder because of his lightning experiments. After surviving, he would have a splitting headache every rainy day. However, after he happened to get a jade pendant, his headache was greatly alleviated. The jade stone had changed his life, and he had become an immortal cultivator. I hope you like this fairy's recommendation. Muah ~😗
It could be a metaphor for how problems tend to accumulate when one bad thing happens. Like if you lose your job and then your car breaks down all at once.
Maybe it's because the rain creates certain conditions that are favorable for the monster. Like, it could be that the moisture or the sound of the rain triggers something in the monster.