The three types of flooding are River, Coastal and Urban. River floods are caused by water levels that exceed natural river banks. The streets will flood and the waters will rise gradually. These types of floods are the ones that you see people sand-bagging the river bank in order to prevent damage. Sometimes it is successful.
Coastal flooding is associated with storms and high tides.
Both coastal and river floods are compounded by urban flooding. Urban flooding happens when there is not enough natural ground to absorb normal rain water, due to paved parking lots and urban sprawl. When this is the case, normal rainfall will cause streets to flood as storm sewers get overwhelmed. If you are in any of these ordinary floods follow all the same rules for a flash flood. 72 Hour Kits and Floods Emergency Organizations are faced with the same difficulties you are when a flood occurs.