Depending upon the type and magnitude of the disaster it is very possible that you may not have access to food, water, and electricity for several days. It is recommended that you store enough emergency food for at least three days.
Tips and recommendations to follow
Consider any dietary restrictions and preferences you may have
Foods ideal for storing are: Shelf-stable (no refrigeration required) low salt, and do not require cooking (e.g. canned fruit, vegetables, peanut butter, jam, low-salt crackers, cookies, cereals, nuts, dried fruit, canned soup or meats, juices and non-fat dry milk)
Most canned foods can be stored safely for at least 18 months. Low acid foods like meat products, fruits or vegetables will normally last at least 2 years.
Use dry products, like boxed cereal, crackers, cookies, dried milk or dried fruit within six months
Consider needs of infants and seniors such as formulas, baby food, and diet items
Store food in airtight, pest-resistant containers in a cool, dark place
Mark a rotation date on any foods that does not have an expiration date
After a power outage attempt to keep your refrigerator door closed as much as possible. Food should generally be consumed within four hours. Food in a freezer will normally remain safe for two days