Let me start with what a 72-hour kit actually is — because the name causes some confusion. It's not a bag you carry into the wilderness. It's a collection of supplies that lets your household function for three days without depending on stores, utilities, or emergency services. That might mean staying home during a power outage, or it might mean having everything you need when you evacuate.
FEMA and Ready.gov both recommend 72 hours as the minimum baseline for household preparedness. That's based on real disaster response timelines — how long it typically takes for infrastructure and emergency services to stabilize after a regional event. In some cases it's shorter; in some it's longer. Seventy-two hours is a reasonable floor, not a ceiling.
What a 72-Hour Kit Is and Why 72 Hours
The goal is simple: if something disrupts normal services — power, water, access to stores — your household can manage comfortably without scrambling. That's it. No wilderness survival skills required. Most people who use their 72-hour kit never leave home. They're just comfortable during an outage instead of stressed.
You can build a 72-hour kit as a dedicated bag (useful for evacuation scenarios) or as a set of supplies stored at home (more practical for shelter-in-place situations). Many households do both: a home supply and a smaller go-bag. We'll cover both approaches here.
Water — The Most Important Item
Water is the non-negotiable. Dehydration sets in faster than hunger, impairs decision-making, and can become dangerous within 24 hours in hot weather or physical activity. Plan for at least one gallon per person per day — so a family of four needs a minimum of 12 gallons for 72 hours.
That's a starting point, not a ceiling. You'll use more water than you think once you account for:
- Cooking (even if minimal)
- Basic hygiene — brushing teeth, washing hands
- Pets
- Hot weather or physical exertion, which increases needs significantly
A reasonable household target is 1.5 gallons per person per day for a comfortable margin. Store water in food-grade containers in a cool, dark place. Commercial water storage containers designed for this purpose are inexpensive. Standard store-bought water jugs work fine and are easy to rotate.
Also include a way to get more water if your supply runs out. A portable water filter (Sawyer Squeeze, LifeStraw, or similar) weighs a few ounces and can purify water from almost any fresh source. Purification tablets are a lightweight backup. These items together weigh almost nothing and cost under $30 — among the best investments in your kit.
Food for Three Days
Food for a 72-hour kit doesn't need to be exotic. The priorities are: shelf-stable, calorie-dense, minimal preparation required, and something your household will actually eat. Stress is not a good time to discover your family dislikes the food in your emergency kit.
Good options that most households already have or can easily store:
- Canned goods — soups, beans, tuna, chicken, fruit. Choose pull-tab lids where possible. Include a manual can opener.
- Nut butters — high in calories and protein, no refrigeration needed, versatile.
- Crackers and granola bars — easy to eat without preparation, good for morale.
- Dried fruit and nuts — calorie-dense and shelf-stable for months.
- Instant oatmeal, ramen, rice pouches — require minimal water and a heat source.
Aim for roughly 2,000 calories per adult per day. Children need less; active adults may need more. Don't forget comfort foods — a bar of chocolate, a favorite snack, a packet of instant coffee. Morale during an emergency is not trivial.
Light and Power
When the power goes out, three things matter most: being able to see, being able to charge your phone, and being able to receive information. Build your light and power section around those three needs.
- Flashlights — one per household member. LED flashlights last for years on batteries. Keep spare batteries.
- Headlamp — hands-free light is genuinely useful for tasks. One is sufficient for most households.
- Candles — morale item as much as practical. Keep a lighter or matches.
- Portable power bank — minimum 10,000 mAh to charge a phone 2–3 times. Keep it charged as part of regular kit maintenance.
- Battery or hand-crank weather radio — receives NOAA weather alerts and emergency broadcasts when cell service is down. This is one of the most underrated items in any kit.
First Aid Basics
A 72-hour kit first aid supply doesn't need to be comprehensive — it needs to handle common minor injuries and stabilize anything more serious until you can get professional help. The basics:
- Adhesive bandages, multiple sizes
- Sterile gauze pads and medical tape
- Antiseptic wipes and antibiotic ointment
- Blister treatment (moleskin or blister pads)
- Pain reliever (ibuprofen or acetaminophen)
- Antihistamine for allergic reactions
- Nitrile gloves (multiple pairs)
- Tweezers
- Any prescription medications your household takes — a 3–5 day supply, rotated regularly
Warmth and Shelter
Exposure is one of the most dangerous aspects of many emergency situations — and one of the most preventable with simple supplies. Include:
- Emergency mylar blankets — two per person. They fold to pocket size and reflect body heat effectively. Not comfortable but genuinely effective.
- Rain gear — a packable rain jacket or emergency poncho. Getting wet accelerates heat loss.
- Extra warm layers — a fleece or wool sweater, extra socks (wool preferred), a knit hat. These items live in your kit, not your closet.
If you live in a cold climate or expect your kit might be used away from home overnight, consider adding a lightweight sleeping bag rated for your conditions.
Communication
When cell networks are congested or down during a regional emergency, you need alternatives. Your communication supplies should cover three things:
- Receiving information — a NOAA weather radio keeps you updated on official guidance and emergency broadcasts independent of your phone or internet.
- Staying in contact — a charged power bank keeps your phone alive. Pre-determine an out-of-area contact that everyone in your household knows to call or text.
- Navigating without your phone — printed maps of your area and evacuation routes. Your phone's GPS works without cell service, but paper works without any power.
Documents and Cash
Keep copies (not originals) of these documents in a waterproof sleeve in your kit:
- Photo IDs for every household member
- Insurance cards (health, home or renters, auto)
- Emergency contact list with phone numbers
- Prescription information
- Any critical legal or medical documents
Also keep cash in small bills — $100–200 minimum. ATMs fail during power outages. Card readers fail. Small bills are more useful than large ones for buying fuel or supplies during a disrupted situation.
Personal and Household-Specific Items
Every household is different. Consider your specific needs:
- Infants — formula, diapers, wipes, a comfort item
- Young children — activities, comfort items, familiar snacks
- Elderly family members — extra medications, mobility aids, medical devices and their power requirements
- Pets — food, water, medications, vaccination records, carrier or leash
- Medical equipment — CPAP machines, insulin storage, hearing aid batteries
These items can add significant weight and bulk to a go-bag. For a home kit, that's less of a concern. For a portable kit, plan your weight budget accordingly.
Maintaining Your Kit
A kit you built two years ago and never checked is not a reliable kit. Maintenance takes 20 minutes twice a year. Many people tie it to daylight saving time changes. Each time you check:
- Review food and medication expiration dates. Replace anything within 3 months of expiring.
- Charge your power bank. Test your flashlights.
- Update documents if anything has changed.
- Swap seasonal clothing items if needed.
- Check water container integrity.
How Much This Costs
| Category | Budget Option | Reasonable Target |
|---|---|---|
| Water storage (12 gallons) | $8–15 (store-bought jugs) | $20–40 (proper storage containers) |
| Food (3 days, 2 people) | $20–40 (from pantry) | $50–80 (dedicated kit food) |
| Flashlights + batteries | $15–25 | $30–50 |
| Power bank | $20–30 | $40–60 |
| Weather radio | $20–30 | $35–60 |
| First aid basics | $15–25 | $30–50 |
| Warmth layers | $10–20 (items you own) | $30–50 |
| Water filter | $20–30 | $25–35 |
| Total (two adults) | $128–215 | $260–425 |
You don't need to buy everything at once. A staged approach — water and food first, then light and power, then the rest over a few weeks — makes this manageable on any budget.