Emergency Food Storage: What Actually Lasts, and How Much to Store

FEMA’s food-and-water guidance is older than most of the gear sold around it, and it hasn’t really changed: the baseline is a 3-day supply of non-perishable food for evacuation scenarios, and ideally a 2-week supply at home for longer disruptions. Water is more specific: one gallon per person per day, minimum, with FEMA explicitly noting that a normally active person needs at least half a gallon just for drinking — the rest covers food prep and basic hygiene.

How much to actually store

Hot climates, pregnancy/nursing, and illness all increase the daily requirement — FEMA notes very hot temperatures can roughly double water needs. If 56 gallons sounds like a lot of space, it is; most households realistically stock the 3-day minimum and treat anything beyond that as a stretch goal, not a requirement.

What actually lasts vs. what’s marketing

“25-year shelf life” freeze-dried buckets are real — the dehydration process genuinely extends shelf life that long when stored correctly (cool, dry, sealed). But most households don’t need to start there. A rotating stock of canned goods, rice, pasta, peanut butter and shelf-stable milk you already eat does the same job for the 2-week target, at a fraction of the cost, as long as you actually rotate it using FIFO (first-in-first-out) — eat the oldest cans first, replace what you use.

Where long-shelf-life freeze-dried food earns its price premium: true multi-year storage you don’t plan to touch for years (a genuine “set it and forget it” layer on top of your rotating pantry), or extreme space constraints where a compact bucket matters more than cost per calorie.

Water storage and treatment basics

• Store bottled water in its original sealed container and respect the “use by” date — don’t refill old bottles for long-term storage.
• If you need to treat water of uncertain quality: boiling for one full minute is FEMA’s recommended safest method.
• Chemical treatment: FEMA’s guidance is 16 drops (1/8 teaspoon) of plain, unscented household bleach (5.25-6% sodium hypochlorite) per gallon, stirred and left to stand 30 minutes.

Frequently asked questions

Can I just use tap water stored in old bottles?

FEMA recommends against reusing non-food-grade containers for long-term storage; use commercially bottled water in its original sealed container, or food-grade storage containers if you’re filling your own.

How long does canned food actually last?

Most commercially canned food is safe well past its printed date if the can is undamaged and stored in a cool, dry place — but rotate on a FIFO basis so you’re never relying on guesswork during an actual emergency.