If you're expecting flooding in your area:
- Keep the radio or television tuned to weather or emergency information.
- Beware of flash flooding. Do not wait for instructions to move if authorities think flash flooding is possible.
- Beware of streams, ditches, drainage channels, canyons, and other low-lying areas. Flash floods can happen in these places far from the storms that bring the rain.
If you must evacuate, you should do the following:
- Secure your home.
- If you have time, bring in outdoor furniture.
- Move essential items up off the floor, or to an upper floor.
- Unplug electrical appliances.
- Turn off utilities (gas and electric) at the main switches or valves if instructed to do so.
- Do not touch electrical equipment if you are wet or standing in water.
- If you must walk through water, only go through standing water. Six inches of moving water can make you fall. Use a stick to check the firmness of the ground in front of you.
- Driving through flooded areas is extremely dangerous.
via firstaid.about