Stay away from downed power lines. Flood Statistics Statistics to remember if you are ever faced with the decision of crossing a flooded roadway As little as one foot of water can move most cars off the road. Just six inches of fast-moving flood water can sweep a person off his or her feet. Most flood-related deaths occur at night and are vehicular. Urban and small stream flash floods often occur in less than one hour.
Tropical cyclones pose significant risk well inland due to fresh water flooding.