What are the three periods of great summer heat? What are the three periods of great summer heat?

1, there are three periods in summer: one is when rotten grass is firefly, the other is when the soil is hot and humid, and the third is when it rains heavily.

2, a rotten grass is a firefly, indicating that fireflies lay eggs on hay. In hot summer, fireflies ovulate, so the ancients thought that fireflies were transformed from rotten grass; Second, when the soil is hot and humid, it means that the weather begins to get sultry and the land is very humid; When it rains heavily, it means that there are often heavy thunderstorms.