How long does food stay safe in a fridge without power?

A refrigerator that stays closed holds a safe temperature for about four hours. A full freezer keeps food safe for roughly 48 hours, a half-full freezer about 24. When in doubt, throw it out — spoiled food during an outage is a preventable illness.

Can I use candles for light?

Candles are the leading cause of house fires during outages. Use LED lanterns and headlamps, which are brighter, safer and cheaper to run. Reserve candles for decoration, not for emergencies.

How much water should I set aside in the first hour?

Fill everything you have: bathtub, jugs, bottles, pots and pet bowls. Two adults need roughly two gallons a day for drinking and cooking plus another gallon and a half for basic hygiene, so a bathtub liner full is genuinely useful.

Should I run a generator overnight?

Only if it is outdoors, well away from windows, doors and vents, and you have a battery carbon monoxide alarm inside. Most overnight needs — a fridge cycle and phone charging — are better served by a battery station.

Field Article // Preparedness

The 72-Hour Blackout Checklist

The first hour decides how much food you keep and how calm the next two days feel. Here is the sequence to follow, in order, when the lights go out.

Survival Video Hacks Field DeskSep 12, 2026 6 min read

Key takeaways // 30-second read

Do not go shopping in hour one — instead protect the cold chain, light with battery lanterns, and fill every container that holds water.
A closed fridge holds temperature about four hours; a full freezer roughly 48 hours and a half-full freezer about 24.
Concentrate the household into one insulated room, and communicate once with a check-in time rather than refreshing phones all day.
Decide the pivot early: if the outage will last days, leave for a safer location on your own terms, not in an emergency.
Treat each outage as a free audit — write down what you ran out of and restock in the following week.

Hour one: stabilise, do not shop

Find out how big it is. Check the utility outage map on a phone battery, then turn to the battery radio. Knowing whether it is your street or three states changes everything.
Protect the cold chain immediately. Move anything you will eat soon from the fridge to the freezer, fill empty space with frozen water bottles, and tape the doors shut with a reminder note.
Light without burning the house down. Headlamps and battery lanterns, never candles as a primary. Candles cause house fires during outages.
Fill everything that holds water. Bathtub, jugs, bottles, pet bowls. If pressure drops, this is the water you have.

Hours two to twelve: triage and comfort

Refrigeration rules of thumb: a closed fridge holds safe temperature for about four hours; a full freezer for roughly 48 hours, half-full for 24. Every opening costs you time.
Cook the food that will spoil first, outdoors, on whatever method you have.
Set up one room. Concentrate heat, light and people in a single room rather than heating the whole house. Close doors to unheated areas.
Communicate once, then conserve. Send one message setting expectations and a check-in time, then put phones in low-power mode and stop refreshing.

Hours twelve to forty-eight: manage the household

Rotate charging. Run the power station during the day for phones and medical devices; keep it above 50 percent and reserve capacity for overnight needs.
Manage water. Drinking and cooking first, hygiene second, washing last. If a boil-water notice is issued, boil for one minute and treat stored water.
Watch the temperature. Below 50°F indoors, move to one room and insulate it. Never use charcoal or a propane heater indoors.
Check on neighbours, especially anyone elderly, living alone, or dependent on powered medical equipment.

Hours forty-eight to seventy-two: prepare for the next stage

Decide the pivot. If the outage is projected to last days and you have somewhere safer to go, leave early rather than in an emergency.
Ration and cook from storage. Stop opening the freezer, and start working through shelf-stable food and stored water deliberately.
Restock what you used. Every outage is a free audit: write down what you ran out of and fix it in the calm week that follows.
Document. Photograph spoiled food and damage for insurance, and note the timestamps.

Before the next one

Three changes prevent most of the pain: a battery station sized for your refrigerator and comms, a freezer full of frozen water bottles, and a written plan taped to the inside of a kitchen cupboard. Rehearse with a planned four-hour shutdown and you will find every gap without the pressure.

Gear & Equipment // Tested