When the power goes out, keep your fridge and freezer closed, use flashlights instead of candles, and check on neighbors who may need help. Most outages resolve within hours. The ones that last two to three days are what you actually need to prepare for.
That is the short version. Here is the longer one.
Most people think of a power outage as a minor inconvenience. Candles, maybe a board game, early bedtime. For a few hours, that is accurate. But stretch it past 24 hours and things shift. Your fridge starts warming. Your phone dies. If it is winter, your house gets cold fast. If it is summer, it gets dangerously hot.
The good news: a little preparation turns a two-day outage from stressful to manageable.
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The First Two Hours: Immediate Steps
When the power goes out, start here:
1. Check if it is just your house. Look outside. If your neighbors have lights, check your breaker panel.
2. Report the outage. Call your utility company or use their app. Check PowerOutage.us for a real-time outage map.
3. Unplug sensitive electronics. When power returns, the initial surge can damage computers, TVs, and other electronics.
4. Conserve phone battery. Turn on low-power mode. Turn off Wi-Fi and Bluetooth. Reduce screen brightness.
5. Find your flashlights. Headlamps are better than flashlights because they keep your hands free. Candles are a fire hazard.
6. Check on vulnerable people. Elderly neighbors, people with medical equipment, and families with young children may need help.
Food Safety During a Power Outage
Your refrigerator keeps food safe for about four hours with the door closed. Your freezer maintains safe temperature for 24 to 48 hours depending on how full it is.
The rules:
Appliance | Door Closed | Safe Temperature |
|---|---|---|
Refrigerator | 4 hours | Below 40°F |
Freezer (full) | 48 hours | Below 0°F |
Freezer (half full) | 24 hours | Below 0°F |
The thermometer rule: If you do not have a thermometer in your fridge, get one. An appliance thermometer ($8) removes all guesswork. If the temperature is above 40°F for more than two hours, discard perishable items.
What to eat first: Start with perishables in the fridge (leftovers, dairy, meat). Then move to freezer items as they thaw. Save shelf-stable pantry food for last.
Staying Warm Without Heat
In winter, a house without heat loses about 1 to 2 degrees per hour depending on insulation. After 24 hours, indoor temperature can drop to uncomfortable or dangerous levels.
What to do:
Pick one room and close it off. An interior room with few windows retains heat best.
Seal gaps under doors with rolled towels.
Layer clothing: thermal base layer, insulating mid layer, outer layer.
Use sleeping bags rated for cold weather. A good bag keeps you warm even in a cold room.
Disposable hand and body warmers ($1 each) provide hours of supplemental heat.
What NOT to do:
Never use a gas oven or stove for heat. Carbon monoxide kills silently.
Never run a generator indoors or in an attached garage. Not even with the door open.
Never use a charcoal grill indoors for any reason.
A battery-powered carbon monoxide detector ($20 to $30) is essential during any power outage in cold weather.
Staying Cool Without AC
Heat is actually more dangerous than cold. Heat-related illness sends more people to the hospital than any other weather event.
Close blinds and curtains on sun-facing windows.
Open windows on opposite sides of the house for cross-ventilation (if outdoor temp is lower than indoor).
Use battery-operated fans. A rechargeable fan ($20 to $40) runs for 8 to 24 hours on a charge.
Wet a towel and drape it over your neck or forehead.
Stay hydrated. Drink water before you feel thirsty.
Move to the lowest level of your home (heat rises).
If indoor temperature becomes dangerous (above 95°F with humidity), go to a public cooling center. Libraries, malls, and community centers often serve as unofficial cooling stations during heat emergencies.
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Backup Power Options
If you want to keep critical devices running during an outage, you have three main options:
Option | Cost | What It Powers | Runtime |
|---|---|---|---|
Portable phone charger (10,000 mAh) | $20 to $40 | Phones, small devices | 2 to 3 phone charges |
Portable power station (500 to 1,000 Wh) | $300 to $1,300 | Phone, laptop, lights, small fridge | 4 to 14 hours (fridge) |
Portable generator (3,000 to 7,000 W) | $400 to $1,500 | Most household items including fridge and furnace fan | 8 to 12 hours per tank |
For most households, a portable power station is the sweet spot. The Jackery Explorer 1000 Plus ($1,299, frequently on sale) can run a standard fridge for about 14 hours. Budget alternative: Bluetti AC70 ($500).
If you go with a generator, store fuel safely (outside, in approved containers) and never run it indoors or in a garage. Carbon monoxide from generators kills dozens of people every year during outages.
Communication During an Outage
When the power is out and cell towers are congested, your communication options narrow quickly.
Text instead of call. Text messages use less bandwidth and are more likely to go through when towers are overloaded.
Battery-powered weather radio. The Midland ER310 ($40) picks up NOAA weather alerts, AM/FM, and runs on batteries, hand crank, or solar.
Paper emergency contact list. Your phone might die. Have critical numbers written down.
Car radio and car charger. Your car is a mobile power station. You can charge devices and get AM/FM news through the radio.
Preparing Before the Outage Happens
The best time to prepare for a power outage is before it happens. Here is the checklist:
Headlamp and extra batteries for every person in the house
Portable phone charger, fully charged
Weather radio with fresh batteries
Flashlights in accessible locations (bedroom, kitchen, hallway)
Appliance thermometer in the fridge
Cash on hand ($100 to $200 in small bills — card readers need power)
Cooler and ice packs in the freezer (transfer fridge items if outage exceeds 4 hours)
72-hour food supply that requires no cooking
Full tank of gas in at least one vehicle
Prescription medications with at least a 72-hour supply
When to Leave
Most power outages are endurable at home. But there are situations where leaving is the right call:
Indoor temperature drops below 50°F or rises above 95°F and you cannot manage it
Someone in the household has a medical condition requiring powered equipment
The outage exceeds 48 hours with no estimated restoration time
Water supply is affected (electric well pumps stop without power)
Have a destination in mind before you need one. A friend or family member in an unaffected area, a hotel, or a public shelter.
Stay Prepared, One Week at a Time
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Frequently Asked Questions
How long does food last in the fridge without power?
A closed refrigerator keeps food safe for approximately four hours during a power outage. A full freezer maintains safe temperature for about 48 hours; a half-full freezer for about 24 hours. Use an appliance thermometer to check: discard perishable food that has been above 40°F for more than two hours.
Is it safe to run a generator in a garage with the door open?
No. Never run a generator in a garage, even with the door open. Carbon monoxide accumulates quickly in enclosed and semi-enclosed spaces. Place generators at least 20 feet from any door, window, or vent, with the exhaust pointing away from the house. Carbon monoxide from generators kills dozens of people every year during power outages.
What is the best backup power for a power outage?
For most households, a portable power station in the 500 to 1,000 watt-hour range offers the best balance of safety, versatility, and cost. It can power phones, laptops, lights, and a small fridge without the carbon monoxide risk of a generator. For whole-house backup, a portable generator (3,000 to 7,000 watts) with proper outdoor placement handles larger loads.
How do I keep my house warm during a winter power outage?
Close off all rooms except one interior room with few windows. Seal door gaps with rolled towels. Layer clothing. Use sleeping bags rated for cold weather. Disposable hand and body warmers provide supplemental heat. Never use a gas oven, stove, charcoal grill, or generator indoors for heat due to carbon monoxide risk.
Should I keep my fridge and freezer open or closed during a power outage?
Keep them closed. Every time you open the door, cold air escapes and warm air enters. A closed fridge maintains safe temperature for about four hours. A closed, full freezer stays safe for about 48 hours. Group items together in the freezer (a fuller freezer stays cold longer) and avoid opening either door unless absolutely necessary.
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