Discard mattresses and stuffed furniture. They can't be adequately cleaned, even with steam. Wash dirt and mud from walls, counters and hard surfaced floors with soap and water. Then disinfect by wiping surfaces with a solution of one cup bleach per gallon of water. Discard all food that has come into contact with flood water.
Canned food is all right, but disinfect the can before opening.
To keep food safe , use food that spoils rapidly first. Most foodborne diseases are caused by bacteria in raw or undercooked foods of animal origin such as meat, milk, eggs, fish or shellfish. Proper storage and cooking of these foods can help prevent illness. Keep refrigerator and freezer doors closed to conserve cold air or keep cold food cold with ice, dry ice or snow. It is most important to keep meat, seafood and dairy products cold.