Each person will need a gallon of water per day for three or four days. Turn your refrigerator and freezer to the coldest setting. The colder food is before a possible power failure, the longer it will last. Wrap it in brown paper for longer storage and separate it from direct food contact with a piece of cardboard. Fill a partly empty freezer with crumpled newspaper to cut down on air currents which cause the dry ice to dissipate.
Flooding often accompanies hurricanes.
If you live in an area subject to floods, be ready to raise refrigerators or freezers by putting cement blocks under their corners. If you keep canned goods and other foods in a basement or low cabinets, move them to a higher location. Flood waters may carry silt, raw sewage, oil or chemical waste. These items are safe if you sanitize the containers. Mark contents on can or jar lid with indelible ink.