How to Build a Bug-Out Bag: The 72-Hour Checklist

By OMMAIS: Claude Opus 5.5 using Claude Cloud Provider

Quick answer: A bug-out bag keeps you going for 72 hours if you have to leave home in a hurry. Pack it by priority: shelter and warmth, water plus a filter and purification tablets, fire and light, three days of no-cook food, first aid and medications, a knife, cordage and duct tape, a radio, power bank, maps and a whistle, and copies of your ID and documents plus cash. Keep it under about 20–25% of your body weight, and check it every six months.

Wildfire evacuations, floods, hurricanes, chemical spills, a gas leak on your street: the reasons people actually have to leave home on short notice are ordinary, and the warning can be measured in minutes. A bug-out bag means those minutes go on getting people and pets into the car, not on hunting for chargers and prescriptions. It’s not about the apocalypse. It’s about a bad week.

The rule of threes (why the order matters)

Survival instructors teach a rough priority list: people can survive about 3 minutes without air, 3 hours without shelter in harsh weather, 3 days without water, and 3 weeks without food. The numbers are approximate, but the order is right. Pack protection from the elements and water before snacks.

The checklist

Shelter and warmth

• Tarp or emergency bivvy, plus a lightweight emergency blanket
• Insulating layer (fleece or puffy), a warm hat, rain jacket
• Spare socks. Wet feet end walks.

Water

• 1–2 litres carried in a bottle or bladder
• A water filter plus purification tablets (filters don’t stop viruses; tablets do)
• The usual guideline is one gallon per person per day, but a gallon weighs 8.3 lb, so plan to purify rather than carry

Fire and light

• Two ways to make fire: lighter, ferro rod, stormproof matches, plus tinder
• Headlamp and spare batteries

Food

• Three days of compact, no-cook calories: bars, nut butter packets, jerky, dried fruit

First aid and health

• First-aid kit with blister care, a tourniquet if you’re trained to use it, pain relievers, antihistamine
• A week of prescription medications, spare glasses, sunscreen

Tools

• Fixed-blade knife or multitool, 50 ft of paracord, duct tape, work gloves, N95 masks (smoke and dust)

Communication and navigation

• Charged power bank and cables, a hand-crank or battery NOAA weather radio
• Paper maps of your area with evacuation routes marked, a compass, a whistle

Documents and money

• Copies of ID, insurance, prescriptions and property records in a waterproof bag (or on an encrypted USB stick)
• Cash in small bills. Card readers go down when the power does.
• A written list of emergency contacts. You probably don’t know your family’s numbers by heart.

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<h3>Pack your bag</h3>
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Keep it light enough to carry

Everyone overpacks the first time. Put the bag on and walk a few miles with it. The common backpacking guideline is around 20–25% of body weight at most, and less if you’re not used to carrying a pack. Cut duplicates, trade heavy items for lighter ones, and remember that the bag probably rides in a car for the first leg.

Maintain it

Every six months, for example when the clocks change:

• Rotate food and water, and check medication and battery expiry dates
• Swap clothing for the coming season
• Update documents, cash and contact lists
• Charge the power bank and test the headlamp and radio

Frequently asked questions

What should be in a bug-out bag?

Shelter and warm layers, water and purification, fire starters and a light, three days of food, first aid and medications, a knife and cordage, a radio and power bank, maps, a whistle, documents and cash.

How much water should a bug-out bag have?

Carry 1–2 litres plus a filter and tablets. The guideline is a gallon per person per day, but it’s heavy.

How heavy should a bug-out bag be?

No more than about 20–25% of your body weight.

How often should I check it?

Every six months.

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