Emergency Baby Formula and Infant Food: How to Build a Safe Supply for Outages and Disasters

Quick answer: keep at least a two-week supply of your baby’s usual formula, and include some ready-to-feed formula, which needs no water and is the safest choice when tap water may be unsafe or you cannot boil it. Never make homemade formula and never water down formula to stretch it; the FDA and pediatric experts warn both can seriously harm infants. Mix powdered formula only with safe water, use prepared bottles within the time limits on CDC guidance, and stock clean bottles or single-use nipples, plus age-appropriate shelf-stable baby foods if your child eats solids. Ask your pediatrician about specialty formulas before an emergency.

An infant cannot share the family’s canned chili. Babies depend on a narrow set of foods, need them on schedule and are especially vulnerable to unsafe water and spoiled food. A disaster that is an inconvenience for adults, like a boil-water notice or a three-day outage, can quickly become a crisis for a household with a newborn.

Planning ahead removes most of that risk. This guide covers how much to store, which formula types make sense for emergencies, how to prepare and store feeds safely without power and what to keep for older babies. It is part of our emergency food storage guide, which covers the rest of the household pantry.

Sources: U.S. Food and Drug Administration, consumer guidance on infant formula, homemade formula and diluting formula; Centers for Disease Control and Prevention, infant formula preparation and storage guidance and infant feeding in emergencies; American Academy of Pediatrics, HealthyChildren.org guidance on formula and emergencies; Ready.gov, family emergency kit lists; USDA FSIS, food safety during power outages. General information, not medical advice; follow your pediatrician’s guidance for your child. Checked October 2026.

How Much Formula to Keep on Hand

Ready.gov includes infant formula, bottles, diapers and wipes on its basic family emergency kit list. For storage planning, a two-week supply is a sensible target, matching the two-week household supply many preparedness agencies recommend. Stores can be closed, shelves can be empty and deliveries can stop for days after a storm.

To estimate your baby’s needs:

1. Track a typical day of feeds for a few days and note the total ounces.
2. Multiply by 14 for a two-week supply.
3. Convert to containers using the yield printed on the label. A can of powder lists how many fluid ounces of prepared formula it makes.
4. Recalculate every month or two. Intake changes quickly in the first year, so a stash that covered two weeks at two months old may only cover one week at five months.

Rotate the supply by using the oldest containers first and replacing them as you shop. Formula has a “use by” date that should be respected, which makes rotation especially important.

Ready-to-Feed vs. Powder vs. Liquid Concentrate

Formula comes in three forms, and each behaves differently in an emergency.

Form	Needs water?	Emergency strengths	Emergency drawbacks
Ready-to-feed	No	Sterile until opened; no water or mixing; safest if water is unsafe	Most expensive; bulky; must be refrigerated after opening
Liquid concentrate	Yes, equal amount	Easier to measure than powder	Needs safe water; opened containers need refrigeration
Powder	Yes	Cheapest; compact; long shelf life	Needs safe water; preparation more involved

Because ready-to-feed formula needs no water, CDC and the American Academy of Pediatrics point to it as the best option during emergencies when safe water is uncertain. Many families keep their everyday supply as powder and add a stash of ready-to-feed bottles or cartons for emergencies.

If your baby uses a specialty or prescription formula, talk with your pediatrician about an emergency supply and what to do if it becomes unavailable. Do not switch to a different specialty product without medical advice.

Formula Mistakes the FDA Warns Against

Shortages and emergencies tempt parents toward shortcuts. The FDA and pediatric experts are clear about three of them.

• Do not make homemade formula. The FDA advises against it because homemade recipes can lack critical nutrients or contain dangerous imbalances, and there have been reports of infants hospitalized after being fed homemade formula.
• Do not dilute formula. Adding extra water to stretch a supply can cause serious nutrient deficiencies and dangerous electrolyte imbalances in infants. Always mix exactly as the label directs.
• Do not substitute other milks for infants. Cow’s milk, plant milks and toddler formulas are not appropriate replacements for infant formula for young babies. If you run low, call your pediatrician, a local health department or WIC office for help locating formula.

Store-brand formulas sold in the U.S. must meet the same federal nutrition requirements as name brands, so they are a reasonable way to build a supply at lower cost. Check with your pediatrician before switching if your baby has specific needs.

Safe Water for Mixing Formula

Water is the weak link in powdered and concentrate feeding. During a boil-water advisory or after flooding, tap water may be contaminated.

CDC guidance for emergencies:

• Use ready-to-feed formula when possible if the water is not safe.
• If you must use powder or concentrate, use bottled water or water that has been brought to a rolling boil for one minute and then cooled.
• Do not use water that may be contaminated with chemicals or fuel, since boiling does not remove chemicals.

Keep a dedicated stock of bottled water for the baby in addition to the household supply. Our guide to emergency water for pets and babies covers amounts, and what to do during a boil-water advisory explains notices and boiling.

Preparation and Storage Times Without a Refrigerator

Prepared formula is a perishable food. CDC’s general preparation and storage guidance includes these limits:

• Use prepared formula within 2 hours of preparation, and within 1 hour of when feeding begins. Discard anything left in the bottle after a feeding.
• Prepared formula refrigerated promptly can be used within 24 hours.
• Opened ready-to-feed or concentrate containers should be covered and refrigerated and used within the time on the label, often 48 hours.
• Opened powder containers should be closed tightly and used within the time on the label, often one month.

Without refrigeration, these limits mean preparing one bottle at a time, right before each feeding. Small single-serve ready-to-feed bottles are useful here because there are no leftovers to keep cold. For general refrigerator guidance during outages, see our timeline for food safety in a power outage.

Keeping Bottles and Nipples Clean

Cleaning bottles takes water and heat, both of which may be scarce. Options to plan for:

• Single-use, pre-sterilized nipples and bottles that attach to ready-to-feed formula, eliminating washing.
• Extra bottles and nipples, so you are not washing after every feed.
• Clean, safe water and dish soap set aside for washing, plus a basin and bottle brush.
• Disposable cups. CDC infant feeding in emergencies guidance notes cup feeding can be used when bottles cannot be cleaned properly; ask your pediatrician to show you the technique before an emergency.

Wash your hands with soap and safe water, or use hand sanitizer if water is unavailable, before preparing every feed.

Breastfeeding During Emergencies

For breastfed babies, breast milk needs no preparation, water or refrigeration when fed directly. Public health agencies, including CDC, encourage continued breastfeeding during emergencies. Stress can affect feeding, but breastfeeding generally continues to provide nutrition and immune support.

Parents who pump should plan for power loss. A manual breast pump is a low-cost backup for an electric pump. Our guide to backup power for medical devices covers charging options, and a cooler with ice packs can keep expressed milk cold for a time. Follow CDC’s storage guidance for expressed milk.

Families that combine breast milk and formula should keep a formula supply as well, sized to the formula share of the baby’s diet.

Food for Older Babies on Solids

Once a baby eats solids, add age-appropriate shelf-stable foods to the kit:

• Jarred or pouched baby food the baby already eats, rotated before the date on the label.
• Single-serve containers, since opened baby food needs refrigeration.
• Infant cereal that can be mixed with prepared formula or breast milk.
• Soft finger foods your baby already handles, appropriate for their age and chewing ability.
• Spoons, bibs and a small cooler for transporting opened food briefly.

Stick to foods your child already tolerates. An emergency is a poor time to introduce a new food, particularly a common allergen.

Storing the Formula Supply Itself

Unopened formula is shelf stable, but storage conditions still matter. Formula labels typically direct storage in a cool, dry, indoor place and warn against extreme heat and freezing. In practice that means:

• Keep it inside the living space, not in a hot garage, attic or car trunk.
• Avoid damp basements where cans can rust and powder can absorb moisture once opened.
• Check every container for dents, bulges, leaks or broken seals before use, and discard any that are damaged.
• Write the use-by date in large marker on the outside of each container so rotation is quick.
• Store it with the feeding supplies, so bottles, nipples and water are in the same bin if you need to leave.

Apartment dwellers with limited room can keep the emergency portion in a single labeled tote in a bedroom closet, separate from the daily supply in the kitchen.

Feeding a Baby During an Evacuation

Evacuation adds travel, crowded shelters and unfamiliar kitchens to the challenge. Pack a grab-and-go feeding bag with at least three days of ready-to-feed formula, single-use nursers or clean bottles, bottled water, baby food if your child eats solids, a bib, spoons, hand sanitizer and a small cooler.

Tell shelter staff right away that you have an infant. Many shelters can provide a cleaner area for preparing bottles, and some receive donated formula and supplies. Keep your feeding bag with you rather than in a vehicle where temperatures can swing widely.

Where to Get Help If You Run Low

If supplies run short during or after a disaster, several sources can help:

• Your pediatrician’s office, which may have samples or advice on safe substitutes for your specific baby.
• Your local WIC office if you participate, which can help with formula access.
• 211, the free information and referral line that connects callers to local assistance, including food and infant supplies.
• Local health departments, hospitals and food banks, which often coordinate infant supply distribution after disasters.
• Disaster relief organizations operating shelters and distribution sites in the affected area.

Reach out early, before the supply is completely gone. That gives you time to find formula without resorting to unsafe shortcuts.

A Baby Emergency Food Checklist

• Two weeks of the baby’s usual formula, plus ready-to-feed for water emergencies
• Bottled water set aside for mixing and cleaning
• Clean bottles and nipples, or single-use nursers
• Measuring tools and a bottle brush
• Manual breast pump and milk storage bags if pumping
• Age-appropriate shelf-stable baby food and infant cereal
• Hand sanitizer, dish soap and paper towels
• A copy of the pediatrician’s contact information and any specialty formula prescriptions

Add these to the family kit described in our 72-hour kit checklist for families.

Frequently Asked Questions

How much formula should I keep for emergencies?

A two-week supply of your baby’s usual formula is a sensible target. Recalculate every month or two because intake changes quickly in the first year.

What is the best formula for emergencies?

Ready-to-feed formula, because it needs no water or mixing. CDC and the American Academy of Pediatrics point to it as the best option when safe water is uncertain.

Can I water down formula to make it last?

No. Diluting formula can cause serious nutrient deficiencies and dangerous electrolyte imbalances. Always mix exactly as directed and call your pediatrician, health department or WIC office if you are running low.

Is homemade formula safe in an emergency?

No. The FDA advises against homemade formula because it can lack key nutrients or contain harmful imbalances.

How long can prepared formula sit out?

CDC guidance says to use prepared formula within 2 hours of preparation and within 1 hour after feeding starts, then discard leftovers.

The Bottom Line

An infant emergency food supply is small, but it has stricter rules than any other part of the pantry. Store two weeks of your baby’s usual formula, add ready-to-feed for times when water is unsafe, keep clean bottles or single-use nursers and plan for safe water. Never dilute formula or make it at home, follow CDC storage times and talk with your pediatrician about specialty needs before an emergency happens.