
- FEMA recommends every household maintain at least 72 hours of water, food, and supplies — fewer than 20% of U.S. households meet this baseline.
- Water is the most critical and most underestimated supply: one gallon per person per day means a family of four needs 12 gallons for 72 hours.
- The six most commonly missed items are: cash in small bills, copies of key documents, prescription medications, a manual can opener, a local paper map, and a whistle.
What Emergency Preparedness Actually Means
Emergency preparedness is not about surviving a disaster movie scenario. It is about maintaining household function for 72 hours when utilities fail, stores close, or evacuation is required. Power outages from storms, water main breaks, wildfire evacuations, and winter weather events all fall into this category — and all are more likely than most people account for. The 72-hour baseline covers the vast majority of residential emergencies.
The goal is not to be the most prepared household in the neighborhood. The goal is not to be the one calling 911 for a water shortage three days after a winter storm.
Tier 1: Water — the Non-Negotiable First Priority
Water fails more often in emergencies than food supply does, and dehydration becomes critical faster than hunger. The standard is one gallon per person per day, which covers drinking and basic sanitation. A family of four needs 12 gallons minimum for 72 hours. Store-bought sealed water jugs last 2 years sealed. Tap water stored in clean food-grade containers should be rotated every 6 months. WaterBOB bathtub liners fill from a standard tap in 20 minutes and hold 100 gallons for emergency storage.
Tier 2: Food — Three Days Without Cooking
Emergency food does not need to be specialized — it needs to be shelf-stable, calorie-dense, and usable without power. Canned beans, tuna, and vegetables, peanut butter, crackers, dried fruit, and nuts cover nutrition without cooking. For households with infants, elderly members, or dietary restrictions, build a two-week rotation of familiar foods rather than unfamiliar emergency rations. A manual can opener is not optional — check your kit has one before trusting any canned supply.
Tier 3: Light, Power, and Communication
A battery-powered or hand-crank LED flashlight per person, with spare batteries stored separately. A battery bank charged to 100% and rotated every 3 months to maintain charge capacity. A weather-band radio — battery or crank-powered — that receives NOAA emergency broadcasts when cell networks are down. A simple paper road map of your region for navigation if GPS fails. Store all electronics away from heat and in waterproof bags inside the kit.
Tier 4: Medical Supplies and Key Documents
A first aid kit with bandages, antiseptic, gauze, medical tape, pain relief medication, and any prescription medications for all household members — at minimum a 7-day supply stored separately from the daily supply. A waterproof folder containing copies of identification, insurance cards, medication lists, and important contact numbers for every household member. This folder is the most replaced item after emergencies — people grab everything except the documents.
Complete 72-Hour Kit Checklist
Go-Bag vs Home Shelter-in-Place Kit
A go-bag is a backpack or duffel containing 72 hours of essentials for rapid evacuation — water, food, documents, first aid, cash, phone charger, and a change of clothes per person. A home shelter-in-place kit is a larger supply stored in one designated location for extended home use during utility failures. Both serve different scenarios — most households need both. The go-bag should be reviewed and repacked every 6 months to account for seasonal clothing, medication changes, and expiration dates.
Store the shelter-in-place kit in a cool, dark location away from flood risk — a high shelf in a ground-floor closet, not a basement in flood-prone areas. Keep the go-bag near the primary exit. Run a 5-minute grab drill once per year with everyone in the household so the location and contents are known under stress, not discovered during the emergency.
Build the kit gradually. Buying a $200 pre-assembled emergency kit is less effective than assembling the same supplies over two weekly shopping trips — you learn what's in it, check the quality of each item, and avoid the sealed kits that expire before anyone inspects them.
Recommended methods
72-Hour Portable Go-Bag
FastestA backpack or rolling duffel with water, food, documents, first aid, and power supplies for each household member. Ready to grab in under 60 seconds. The minimum viable emergency setup.
Full Home Shelter-in-Place Kit
Best OverallA larger, stationary supply covering 7–14 days for the whole household, stored in one designated location. Covers extended power outages, water disruptions, and weather events without evacuation.
Frequently asked questions
How much water do I need in an emergency kit?
One gallon per person per day. A family of four needs 12 gallons minimum for a 72-hour kit. Double this if you have pets, live in a hot climate, or have household members with medical conditions that increase fluid needs.
How often should I replace emergency kit supplies?
Inspect the entire kit every 6 months. Replace water stored in reusable containers, rotate food supplies within their use-by dates, recharge battery banks, update document copies, and check prescription medication quantities.
Should I buy a pre-made emergency kit or build my own?
Build your own. Pre-made kits often include low-quality items, minimal food, and are assembled without accounting for your household's specific needs. Assembling your own takes one afternoon and produces a kit you understand and trust.
What are the most commonly forgotten emergency supplies?
Cash in small bills, prescription medications, a manual can opener, copies of key documents in a waterproof container, a local paper road map, and a whistle. Most pre-made kits omit all six.
Does everyone in the household need their own kit?
For shelter-in-place, one central kit works. For evacuation scenarios, each adult should be able to carry their portion — split the water, food, and documents so no one person carries everything. Children old enough to carry a pack should have their own with snacks, a comfort item, and their own flashlight.
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