 Coastal damage may be caused by strong winds and rain, high waves (due to winds), storm surges (due to wind and severe pressure changes), and the potential of spawning tornadoes.Tropical cyclones also draw in air from a large area—which can be a vast area for the most severe cyclones—and concentrate that air's water content (made up from atmospheric moisture and moisture evaporated from water) into precipitation over a much smaller area.This continual replacement of moisture-bearing air by new moisture-bearing air after its moisture has fallen as rain, may cause multi-hour or multi-day extremely heavy rain up to from the coastline, far beyond the amount of water that the local atmosphere holds at any one time.