Canned food can be eaten right out of the can. If you heat it in the can, be sure to open the can and remove the label first. Ensuring a healthy water supply Store at least a two-week supply of water for each member of your family. Store at least 1 gallon of water per person per day. A normally active person needs to drink at least 2 quarts of water each day.
Heat can double that amount.
Children, nursing mothers and ill people will need more. You will need additional water for food and hygiene. Never ration water. Drink the amount you need today, and try to find more for tomorrow. You can minimize the amount of water your body needs by reducing activity and staying cool.