More people drown in their cars than anywhere else. The road may be washed out below the water surface. Your car may stall or get stuck in the water, and then get pushed off the road. Once off the road, cars often start to roll, making escape impossible. Do not go near downed power lines and electrical wires.
Electrocution is another major source of deaths in floods.
Evacuate your house if instructed to do so. Follow emergency instructions. It is much safer and easier to evacuate before flood waters become too deep. If the waters start to rise inside your house before you have evacuated, retreat to the second floor, attic, or roof. Take dry clothing, a flashlight, and a portable radio with you.