Babies and small children
Infant formula, bottles, diapers, wipes and diaper rash cream. Books, games or puzzles for the waiting.
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Hour zero
A 72-hour kit holds enough water, food, light, first aid and papers for everyone in your home to manage three days on their own. Plan 1 gallon of water per person per day, a few days of food that needs no fridge, and one light per person.

Ready.gov and the CDC both plan around a household getting through the first days on its own supplies. The CDC asks for water for at least 3 days and, if you can, a 2-week supply.
Three days is the floor. Build that first, then add to it as space and budget allow.
Start with these. Amounts are per person unless the row says otherwise.
| Item | Amount | Why |
|---|---|---|
| Water | 1 gallon per day, so 3 gallons for 3 days | Drinking and basic washing. Store more for anyone pregnant or sick, for pets, and in hot weather. |
| Food that needs no fridge | A several-day supply | Canned and boxed food you already eat, plus a manual can opener. |
| Flashlight | One per person | Ready.gov asks for a flashlight for every household member during an outage. |
| Spare batteries | Enough for every flashlight and the radio | Batteries run out before the outage ends. |
| Sleeping bag or warm blanket | One per person | Heat may be off along with the power. |
| Change of clothes and sturdy shoes | One full set, for your climate | Wet or damaged clothes, or a walk out over debris. |
| Prescription medicines | What you take daily | Keep them organised and protected. |
| Glasses and contact lens solution | A spare pair if you have one | Hard to replace when shops are closed. |
Water and food amounts from Ready.gov and the CDC. Water per person per day: 1 gallon (about 3.8 litres).
One of each covers the whole home.
A kit is only complete for your household when it covers each person in it.
Infant formula, bottles, diapers, wipes and diaper rash cream. Books, games or puzzles for the waiting.
Daily prescriptions, a plan for medicines that need cold storage, and a backup plan for any medical device that runs on power.
Pet food and extra water. Count pets when you work out how many gallons to store.
Feminine supplies and personal hygiene items for each person.
Copies of important documents, saved electronically or in a waterproof container.
A written list of phone numbers. A dead phone takes your contacts with it.
A kit that is hard to find or hard to carry tends to stay where it is.
Source: Ready.gov: Build a Kit
Source: Ready.gov: Build a Kit
Source: CDC: Emergency water supply
Water first: 1 gallon per person per day. Then food that needs no cooking or fridge, a flashlight and batteries, a radio, a first aid kit and any medicines you take every day.
Ready.gov asks for at least a several-day supply of non-perishable food. Pick foods your household already eats, and pack a manual can opener.
Replace expired items as you find them and review the whole kit once a year. Home-bottled water gets replaced every six months.
In one spot at home that everyone knows, ready to grab. Ready.gov also suggests a kit at work and one in the car.
The shared items (radio, first aid kit, tools) can be one per household. Water, food, a light, a blanket and clothes are counted per person.
