Why did it suddenly rain heavily?

Wan Li is clear. Why does it sometimes rain? The rain at this time is called "solar rain". In fact, there are clouds when it rains. Some solar rain is caused by dark clouds in the distance and is blown to another place by strong winds. In some cases, the weather suddenly changed and it began to rain. Before the rain fell from the sky, the clouds disappeared, so although it looked sunny, it began to rain.

It is due to the collision of two high-altitude debris with different charges under the action of the solar wind, which leads to the excessive water vapor content in the air in some areas and the rapid evaporation of water vapor due to solar radiation. The rain from the sky had disappeared before it landed, so the weather looked fine, but it began to rain.