There are many factories in a certain town, including eight power plants. Will the heat radiated from the factory reduce local rainfall?

It will not reduce, but will increase precipitation, but the impact will be small.

Precipitation is caused by the condensation of warm and cold air. Requires water vapor and ascending motion conditions.

The water vapor source of precipitation mainly relies on advection water vapor, that is, the water vapor channel from the south at low altitude.

The scope of the factory is too small to affect large-scale precipitation, but it will have a certain impact on individual local convective weather. However, the radiated heat will enhance precipitation (the heat will enhance the upward movement), and Not reducing precipitation.