How long is fridge food safe without power?
The clock started when the lights went out. Here are the numbers that matter, from federal food-safety guidance.
Do this now
- Keep both doors closed. An unopened refrigerator keeps food safe about 4 hours.
- Note the time the power went out. Write it on the fridge door if you have to.
- A full freezer holds a safe temperature about 48 hours — a half-full one, about 24 hours.
- If you have them, move ice or frozen water bottles into the fridge compartment.
The rules, in order
Every door opening spends cold you cannot get back. The 4-hour figure assumes the door stays shut. After 4 hours without power, perishable food in the refrigerator — meat, poultry, fish, eggs, dairy, cut fruit, leftovers — should go in a cooler with ice, or it starts becoming unsafe.
The 40°F line is the real rule. Perishable food that spends more than 2 hours above 40°F (4°C) should be discarded — that's true with or without a storm. A simple appliance thermometer turns guessing into knowing.
When the power comes back
Check the freezer: food that still has ice crystals or reads 40°F or below can be refrozen safely, though quality may suffer. Anything that thawed and sat warm — discard. When in doubt, throw it out. Taste and smell are not tests; the bacteria that make you sick don't announce themselves.
Do not
- Don't open the fridge to check on the food. Every peek costs cold.
- Don't taste food to see if it's still good.
- Don't refreeze anything that fully thawed and sat above 40°F.
- Don't trust how food smells — dangerous bacteria are often odorless.
Common questions
Is food safe after a 3-hour power outage?
If the refrigerator stayed closed, yes — an unopened fridge keeps food safe about 4 hours per federal food-safety guidance. Move perishables to a cooler with ice if the outage will run longer.
Can I refreeze food after the power comes back?
Yes, if it still contains ice crystals or has stayed at 40°F (4°C) or below. Quality may drop, but it's safe. Food that fully thawed and warmed up should be discarded.
How long does a freezer last without power?
About 48 hours for a full freezer and 24 hours for a half-full one — if the door stays closed.
Sources — official guidance
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