Be aware that snakes and other animals may be in your house.
Be aware of the risk of electrocution. Do not touch electrical equipment if it is wet or if you are standing in water. Turn off the electricity to prevent electric shock if it is safe to do so.
Avoid wading in floodwater, which can be contaminated and contain dangerous debris. Underground or downed power lines can also electrically charge the water.
Use a generator or other gasoline-powered machinery ONLY outdoors and away from windows.