Tropical storms may not seem as dramatic as hurricanes, but they are equally as dangerous when it comes to floods. A tropical storm sometimes stalls over an area, creating a train of storms that pick up the moisture from the Gulf and dump that water in the same spot for many hours. This very heavy rain can cause disastrous floods. A recent example is Tropical Storm Allison, which dropped up to 36 inches of rain on the east side of Houston.
