When people talk about emergency preparedness, they often throw around the phrase “72-hour kit” or “three-day supply.” But why 72 hours? And what does that actually mean for your household?
Understanding the first 72 hours of a major emergency — and what you need to get through them — is the foundation of all preparedness planning. Let’s break it down.
Why 72 Hours Matters
In a large-scale disaster — an earthquake, major storm, widespread power outage, or other significant event — emergency services are often overwhelmed in the first three days. Roads may be blocked. Communication systems may be down. First responders are focused on life-threatening situations and critical infrastructure.
This doesn’t mean help isn’t coming. It means you need to be able to take care of yourself and your household for at least three days before outside assistance can reliably reach you.
72 hours is the planning standard used by FEMA, the Red Cross, and emergency management agencies nationwide. It’s not arbitrary — it’s based on decades of real-world disaster response.
What You Need for 72 Hours
Your goal is simple: be able to meet your basic needs at home (or away from home, if you have to evacuate) for three full days without outside help.
Here’s what that looks like:
Water
One gallon per person, per day. For a family of four, that’s 12 gallons total.
This covers drinking, basic hygiene, and minimal food prep. If you have pets, add extra. If it’s hot or you have medical needs, add more.
Store it in clean containers in a cool, dark place. Bottled water from the store works perfectly.
Food
Non-perishable items you actually eat. Don’t buy special “emergency food” unless you’ve tried it and like it.
Good options:
- Canned goods (soup, beans, vegetables, fruit, tuna, chicken)
- Peanut butter, crackers, granola bars
- Dried fruit, nuts, trail mix
- Pasta, rice, oatmeal (if you have a way to cook)
- Shelf-stable milk or plant-based milk
Don’t forget a manual can opener. And keep it simple — this isn’t gourmet cooking, it’s fuel to keep you going.
Light and Power
When the power goes out, your phone dies fast. You need:
- Flashlights (at least one per person)
- Extra batteries
- Optional: headlamp, lantern, or hand-crank light
- Portable phone charger or solar charger
Information
A battery-powered or hand-crank NOAA weather radio is critical. When cell service is down and the internet is out, this is how you’ll hear emergency alerts, evacuation orders, and critical updates.
First Aid
A basic first aid kit should include:
- Adhesive bandages (various sizes)
- Gauze pads and medical tape
- Antibiotic ointment
- Pain relievers (ibuprofen, acetaminophen)
- Any prescription medications your household needs (at least a 7-day supply)
- Tweezers, scissors, thermometer
Sanitation and Hygiene
You’ll need:
- Toilet paper
- Moist towelettes or baby wipes
- Trash bags (heavy-duty, for waste)
- Hand sanitizer
- Soap
- Feminine hygiene products
- Toothbrush and toothpaste
If the water system fails, sanitation becomes a serious issue fast. Plan for it.
Warmth and Shelter
Even if you’re staying home, you might not have heat. Keep:
- Blankets or sleeping bags
- Extra layers of clothing
- Rain gear if you’re in a wet climate
If you might need to evacuate, a tent or tarp is a good addition.
Important Documents
Keep copies of critical paperwork in a waterproof bag or container:
- ID (driver’s license, passport)
- Insurance cards and policy numbers
- Medical information and prescriptions
- Bank account and emergency contact info
- Copies of important documents (birth certificates, deeds, etc.)
At Home vs. On the Go
There are two ways to think about your 72-hour supplies:
At-Home Supply
This is your baseline. Water, food, and essentials stored in your home where you can access them if you shelter in place. It doesn’t need to be portable — it just needs to be there.
Go-Bag (Evacuation Kit)
This is a smaller, portable version of your 72-hour supplies. If you have to leave your home quickly, you grab this bag and go. It won’t have everything, but it has the essentials to keep you going until you reach safety or assistance.
Most households should have both. We’ll cover go-bags in detail in a future post.
Don’t Overthink It
The goal is not perfection. The goal is to be better prepared tomorrow than you are today.
Start with water and food. Add light and information. Build your first aid kit. Work your way through the list at your own pace.
You don’t need to spend hundreds of dollars or buy everything at once. A little at a time adds up faster than you think.
Your Next Steps
- Calculate how much water your household needs for 72 hours (1 gallon per person, per day).
- Go through your pantry and identify what you already have that would work for 3 days.
- Make a list of what you’re missing.
- Pick up a few items each time you grocery shop until you’re covered.
That’s it. You don’t need a plan that’s complicated. You just need a plan that works.
— Cascadia Ready Radio
“Be ready at home. Be ready to help.”