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. 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. Don't use appliances or motors that have gotten wet until they have been taken apart, cleaned, and dried. Use a pole or stick to poke and turn items over and scare away small creatures. And floors and stairs that have been covered with mud can be very slippery. Don't smoke or use candles, lanterns, or open flames unless you are sure that the gas has been turned off and the area has been aired out.