Drowning is the number one cause of flood deaths. Most of these drownings occur during flash floods. Six inches of swiftly moving water can knock you off your feet. And use a pole or stick to make sure that the ground is still there while walking through a flooded area, even where the water is not flowing.
More people drown in their cars than anywhere else.
Don't drive around road barriers. They are there for a reason. The road or bridge may be washed out. Electrical current can travel through water. Report downed power lines to your utility company or local emergency manager.