Scenarios

Grid-Down: What the First 72 Hours Actually Look Like, Hour by Hour

Most grid-down events are not the end of the world; they are three to ten miserable days of no power, spotty water pressure, closed stores, and bad information. Winter Storm Uri in Texas (February 2021) is the modern case study: millions without power in extreme cold, burst pipes everywhere, and households that had water stored, a way to stay warm, and light after dark did fine while their neighbors struggled.

This playbook walks the first 72 hours in the order problems actually arrive, so the decisions are made now, calmly, instead of at hour nine with a phone at 4%.

Quick facts

First casualty: Information: official updates slow down; a battery NOAA/AM radio becomes primary
Water rule: Fill tubs and containers the moment a serious outage looks likely; pressure can fail hours later
Fridge clock: About 4 hours closed for a fridge, 48 hours for a full freezer (24 if half-full), per USDA guidance
Heat rule: One warm room, sealed and insulated, beats trying to heat a house
Biggest household risk: Carbon monoxide from generators, grills, and stoves used indoors; it kills in outages every year

Hours 0-4: stabilize

Fill the bathtub and every large container with water while pressure holds. Get flashlights and lanterns out before dark, check on the fridge/freezer plan (group food, do not open doors to look), and start the information habit: NOAA radio or local AM news at set times rather than doom-scrolling a dying phone. If it is winter, close off one room as the warm room, hang blankets over its doorways, and dress in real layers now.

Text, do not call, your out-of-area contact: texts slip through congested networks that drop calls. Then put the phone in low-power mode and mostly away.

Hours 4-24: settle into the outage rhythm

Eat perishables in order (fridge first, then freezer) and shift to shelf food. Run the generator, if you have one, in short useful bursts (fridge cooling, battery charging, water pumping) rather than continuously, and only outdoors, far from windows: carbon monoxide is the outage killer, and it is odorless. Conserve stored water like it is the whole supply, because until pressure returns, it is.

Check on neighbors, especially elderly ones, in person. In Uri and in hurricane outages alike, the check-in network is the difference between discomfort and tragedy, and it costs nothing but shoe leather.

Hours 24-72: the long middle

By day two the questions become sanitation (a lined bucket with a lid and heavy bags is a toilet when water is scarce), morale (hot drinks, a card game, a routine), and news discipline (rumors outrun facts in every extended outage; trust official channels and your own eyes). Watch pipes in cold snaps: drip faucets if any pressure remains, know your main shutoff, and drain vulnerable lines if the house is going truly cold.

If the outage will clearly run past your supplies, day two is the day to relocate while roads and options are still good. Leaving on day five, out of water, is a much worse trip.

Step-by-step: put it into practice

Tick each step off as you complete it. Your progress is saved on this device.

Fill tubs and containers immediately; water pressure may fail later
Set up lights, the warm room (winter) or coolest room (summer), and the radio schedule
Text the out-of-area contact; phones to low-power mode
Eat fridge food first, then freezer, then shelf storage; keep doors closed
Generator outdoors only, in short bursts; never a grill or stove for indoor heat
Check on neighbors in person, twice a day
Day two: decide honestly whether your supplies outlast the outage, or relocate early

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Sources

Facts checked against the sources above. Last verified: November 11, 2026. If a figure here ever conflicts with an official source, the official source wins, and we want to hear about it via the contact page.