Rain checks are a term used to refer to a variety of different things. In the context of crossword puzzles, rain checks refer to two solutions: tarps and DAMS. Tarps are large sheets of waterproof material that can be used to cover objects or protect them from the rain. DAMS are structures built across rivers or streams to control the flow of water and prevent flooding. Both tarps and DAMS can be used to help protect against the effects of rain.