Emergency food storage: what to buy and how to preserve it safely

A useful emergency food supply contains familiar food, safe water and meals that remain practical when power or deliveries are interrupted. Start with products your household already eats, check how they are prepared and build up supplies within your budget.

This approach is useful for conflict-related disruption as well as ordinary outages. The American Red Cross recommends three days of food for evacuation and two weeks for home use. Those are preparedness targets, not estimates of how long a war would last. Red Cross supply guidance.

What food should you buy first?

Begin with meals that need little preparation and can be eaten without electricity. New Zealand Civil Defence recommends keeping long-lasting food that does not need cooking, together with supplies for babies, animals and any special dietary needs. Household supplies guidance.

Use the following as planning examples, adjusting them for allergies, dietary requirements and the actual product label:

Keep a manual can opener with supplies that need one. Choose some portions small enough to finish at a meal if refrigeration is unavailable.

Count meals, not just packages

Write a sample day's menu for your household. Then check whether you have enough of every ingredient, including drinking water and any water needed for preparation.

For example, four people eating three meals a day for seven days require 84 individual meals. That is a count of meal occasions, not a calorie prescription. A packet advertising 20 servings may represent much less than 20 complete meals; check its nutrition information and serving size.

Make a short inventory with the product, quantity, storage instructions and next review date. Use older suitable stock in normal meals and replace it. This makes preparation part of routine shopping and helps reveal foods nobody wants to eat.

How much water belongs with the food supply?

The CDC recommends at least one US gallon—about 3.8 litres—per person per day for three days, and a two-week supply if possible. It advises allowing more for hot conditions and certain household needs. This is a storage baseline covering drinking and other essential uses, not a personal fluid-intake target. Emergency water guidance.

Do the water calculation alongside the menu. A large supply of dried food is less useful if its preparation consumes water you have not stored.

What happens to food during a power cut?

Keep refrigerator and freezer doors closed as much as possible. FoodSafety.gov gives these approximate holding times:

These estimates do not override measured food temperatures or food-specific advice. Discard refrigerated perishables after four hours without power unless you can establish that they remained at a safe temperature. If food has warmed, use the official chart's time-and-temperature rules. Never taste it to decide whether it is safe. FoodSafety.gov guidance and charts.

Can you preserve food at home for emergencies?

Yes, but the method must be suitable for the food and follow a tested process. Home preservation is a skill to learn with reliable guidance, working equipment and adequate supplies before an emergency.

For low-acid foods such as meat and many vegetables, ordinary boiling-water canning is not a safe substitute for pressure canning. The National Center for Home Food Preservation explains that incorrect processing can allow botulism toxin to develop. Use its tested instructions for the exact food, jar size and altitude. Canning safety guidance.

A closed lid alone does not prove food was processed safely. Do not taste suspect canned food or improvise a preservation recipe to rescue supplies that may already be unsafe.

What changes during a radiation emergency?

The CDC advises using protected food, including sealed containers, and wiping potentially contaminated packaging before opening it. Follow official instructions about outdoor produce and water supplies. Boiling water does not remove radioactive material. Ordinary spoilage rules still apply: packaging protected from fallout does not make spoiled food safe. CDC food and water guidance.

How can you prepare meals safely without mains power?

Make ready-to-eat meals your first option. Never use a camping stove, charcoal grill or portable generator indoors, including in a basement or garage: carbon monoxide can be fatal. Follow the appliance instructions and official placement guidance for any outdoor use. CDC carbon monoxide guidance.

For the wider connection between conflict, energy and deliveries, see our explainer on the Strait of Hormuz and global shipping. Household planning should address interruptions without assuming a particular conflict will cause a particular shortage.