1The weather forecast said there would be a rainstorm in the evening, so I took an umbrella.
2Have you ever been caught in a rainstorm without a raincoat?
3The rainstorm caused flooding in the streets and made it difficult to drive.
4If a rainstorm is coming, it's a good idea to close all the windows and doors.
5The rainstorm was so strong that it knocked over several trees in the park.