Did you know? 90% of all Presidentially-declared disasters include flooding.    90% of all disasters are not Presidentially-declared.    Floods are the most common natural disaster.    Floods and flash floods kill more people in the United States than any other natural disaster.    The most dangerous type of flooding is a flash flood, which usually occurs within minutes or hours of a heavy rainfall, a dam or dike failure or a large break in an ice jam.