How to Prepare for a Multi-Week Power Outage
May 15, 2026 · 2min read · Reviewed against FEMA & CDC guidance
Short outages are inconvenient. Multi-week outages, the kind that follow ice storms, hurricanes, and grid failures, are a different category: they take down water pressure, payment systems, gas stations, and refrigeration all at once. Preparing for one is really preparing for everything, which is why this scenario anchors serious household readiness.
Here are the priorities, in the order they actually bite.
1. Water (day one problem)
Municipal pressure can fail with the pumps, and wells die with the power. Two weeks stored per person is the floor (the math), with purification as the backstop. This is priority one because everything else is survivable longer.
2. Temperature (the killer in both directions)
- Cold: pick one small room, seal it with blankets and towels, and camp there. Sleeping bags outperform space heaters you can't power. Carbon monoxide is the real winter threat: generators outside and 20 feet out, never charcoal indoors, CO detectors with fresh batteries (winter storm checklist).
- Heat: shade the sun side, live low in the house, wet cloth on the neck, and treat water as the utility it is.
3. Food (a solved problem if you prepared)
First 48 hours: eat the fridge and freezer by the food-safety timelines. After that, your shelf-stable supply carries you, cooked without electricity. Two weeks minimum; the 3-month plan if you're building real depth.
4. Light, power, information
- Headlamps beat flashlights (hands), lanterns beat candles (fires).
- Power banks for phones, recharged from the car; a solar panel charger earns its keep by week two.
- A battery or hand-crank NOAA radio, because cell networks degrade with the grid.
5. Money and neighbors
Card readers die with the power: cash in small bills is week-two currency. And check the doors around you; long outages are neighborhood events, and the street that shares generators and freezer space comes through better than the one that doesn't.
The readiness test you can run tonight
The honest question isn't "do we have supplies," it's "how many days would they last the four of us, starting now?" Provision Planner answers it continuously: your food and water scanned in, measured against your real household, with an outage scenario you can run to find the gaps while the lights are still on.
Frequently asked questions
- How do you prepare for a long power outage?
- In priority order: secure water, manage temperature (heating or cooling safely), keep two weeks of no-cook food, and stock light, backup power, and a radio. A multi-week outage disrupts water, refrigeration, heat, and communication, so plan for each.
- How long can a power outage last?
- Most are hours to a day, but major storms, ice, or grid events can cause outages lasting one to three weeks. Preparing for two weeks of self-sufficiency covers the vast majority of realistic scenarios.
- What do you need most during an extended outage?
- Water first (city pressure can fail), then temperature control to avoid freezing or heat illness, then food you can eat without cooking, then light and a way to charge phones and hear official information. Handle them in that order.
You did the reading. Now get your number.
Provision Planner does this article's math for your real household, automatically, and keeps it current as supplies come and go.