What makes rain


 Precipitation - What makes clouds, rain, snow, hail and sleet. When warm, wet air rises, it cools, and water vapor condenses out to form clouds. A cloud is made up of small drops of water or ice crystals, depending on its height and how cold is the surrounding air.

What forms a flood

The amount of water that flows into the region in front of the dam usually exceeds the amount of water that region can disperse quickly, so flooding occurs, a phenomenon known as a flash flood.