TL;DR
Federal food safety guidance is specific: an unopened refrigerator keeps food safe for about four hours, a full freezer for about 48 hours, and a half-full freezer for about 24 hours. Perishable food held above 40 degrees F for more than two hours should be discarded. Never taste food to decide -- when in doubt, throw it out.
This is a food safety question first
Cleaning comes second here, and it is worth saying why.
Food that has been in the temperature danger zone can carry bacteria that produce no smell, no visible change, and no difference in taste. A container can look completely normal and still be unsafe.
That means judgment by appearance is not a method. The published time and temperature rules exist precisely because your senses cannot answer the question.
This article summarizes widely published federal guidance so you know what to look up. For any specific situation -- an unusual outage length, a medically vulnerable household, or a food you are unsure about -- go to the current guidance at foodsafety.gov or your local public health department, and follow that over any article.
Source: USDA Food Safety and Inspection Service guidance on power outages
How long does food stay safe in a fridge without power?
About four hours in an unopened refrigerator, about 48 hours in a full freezer, and about 24 hours in a half-full freezer. Perishable food held above 40 degrees F for more than two hours should be discarded. Keep the doors closed to preserve those windows.
During the outage
What you do while the power is out determines how much you keep.
Keep the doors closed. This is the entire strategy. Every opening costs cold air and shortens the safe window. The published time limits assume the doors stayed shut.
Group freezer items together. A packed freezer holds temperature far longer than a sparse one, and grouping packages helps them keep each other frozen.
Add ice if the outage is going long. Blocks of ice or dry ice extend the window considerably. Handle dry ice with gloves and never in a sealed space.
Use appliance thermometers. A thermometer in the fridge and one in the freezer turn the whole question from a guess into a reading. The targets are at or below 40 degrees F for the refrigerator and at or below 0 degrees F for the freezer.
Note when the power went out. The clock matters more than anything else, and it is easy to lose track.
When the power comes back: what to discard
Work through this before cleaning anything.
Check the thermometers first. If the fridge stayed at or below 40 degrees F, the food is generally fine. If the freezer stayed at or below 40 degrees F and items still contain ice crystals, they can usually be refrozen -- though quality may suffer.
Without a thermometer, use the clock. Discard perishable refrigerated food if it was above 40 degrees F for more than two hours, or if the fridge was without power for more than about four hours with the door being opened.
Discard these when in doubt: meat, poultry, seafood, eggs and egg products, milk and soft cheeses, yogurt, cream-based items, cut fruits and vegetables, cooked leftovers, casseroles, opened deli items, soft or cooked pasta and rice, and anything containing them.
Usually safe: hard cheeses, butter and margarine, whole uncut fruits and vegetables, unopened shelf-stable items, jams, most condiments, and fruit juices -- though guidance varies by product and the current published list is the one to check.
Discard anything that touched raw meat juices as they thawed, even if that item would otherwise be fine.
Never taste anything to test it. Tasting does not detect the organisms that matter and it exposes you to them.
Photograph the discarded food before it goes out if you may file an insurance claim.
Cleaning after the toss
Once the discard decisions are made, the appliance itself needs work.
Empty it completely. Cleaning around remaining items always leaves the spot that caused the smell.
Remove shelves, drawers, and bins and wash them separately in warm soapy water, letting glass shelves come to room temperature before hot water so they do not crack. The full method is in how to clean fridge shelves and drawers.
Wash the interior surfaces with hot soapy water and rinse. Then, if you are sanitizing, use a product intended for food-contact surfaces and follow its label for dilution, contact time, and whether a rinse is required. Do not improvise a mixture, and never combine bleach with an ammonia-based cleaner, an acid such as vinegar, or rubbing alcohol.
Clean the door gasket, where spills and thawed liquid collect in the folds, per how to clean a refrigerator door gasket.
Check under the drawers and in the bottom channel, which is where thawed liquid pools.
Clean the drip pan underneath the unit if it is accessible. It collects defrost water and is a common source of a smell nobody can locate.
Dry everything, then leave the doors open for a while before restarting if the unit will be off. The full interior routine is in how to clean inside a refrigerator.
Odor that survives the cleaning
Some outages leave a smell that outlasts a scrub, and there is an order to dealing with it.
Confirm the source is gone first. A leaked package under a drawer or liquid in the bottom channel will defeat any deodorizing.
Then air it out with the doors open and the unit off, if the weather and household allow.
Absorbents help: an open container of baking soda, activated charcoal, or dry coffee grounds left inside for several days. They work slowly and they do not substitute for removing the source.
Freezers hold odor harder than refrigerators because the plastic liner absorbs it at low temperature, and they often need a longer absorbent period.
If the smell survives all of that, the liner or the insulation may have absorbed it, which is covered in why does my fridge still smell after cleaning.
Disposing of a large amount of spoiled food
An outage can produce more waste than a normal week, and it needs handling.
Bag it doubled and get it out of the house the same day, not into the kitchen bin.
Keep it out of an outdoor bin that pests can reach, or freeze what you can until collection day if power is back.
Check what your local program accepts. Some accept food waste in yard debris collection and some do not, and meat and dairy are frequently excluded even where plant scraps are allowed. Options are covered in fridge cleanout food waste and compost.
Wash the bins afterward, since spoiled liquid leaks and the smell persists otherwise.
Check whether your homeowners or renters policy covers food loss. Many do, above a deductible, which is why the photographs matter.
Preventing the next one from costing as much
Small preparations change the outcome considerably.
Keep appliance thermometers in both compartments permanently.
Freeze containers of water. They fill empty freezer space, extend the safe window, and become drinking water later.
Keep a cooler and ice packs accessible rather than buried in a garage.
Know the outage clock: about four hours for the fridge, about 48 hours for a full freezer, about 24 for a half-full one.
Do not overfill the refrigerator to the point that air cannot circulate, which makes cold spots and warm spots in normal operation.
FAQ
How long can food stay in the fridge without power?
About four hours if the door stays closed. After that, perishable items such as meat, dairy, eggs, and leftovers should be discarded. A full freezer holds a safe temperature for roughly 48 hours and a half-full freezer for roughly 24, again only if it stays shut.
Can you refreeze food that thawed during an outage?
Yes, if it still contains ice crystals or has stayed at or below 40 degrees F. Quality may decline, but it is safe. Food that thawed completely and rose above 40 degrees F for more than two hours should be discarded rather than refrozen.
How can you tell if food is still good after a power outage?
You cannot tell by looking, smelling, or tasting -- harmful bacteria often produce no detectable change. Use a thermometer reading and the elapsed time instead, follow published food safety guidance, and discard anything you are unsure about. Never taste food to test it.
What do you clean a fridge with after spoiled food?
Wash with hot soapy water and rinse, then sanitize with a product intended for food-contact surfaces, following its label for dilution and contact time. Never combine cleaning products, and pay particular attention to the door gasket and the channel under the drawers.
How do you get the smell out of a freezer after an outage?
Remove the source completely, wash and rinse every surface, then leave the door open to air out. Absorbents such as baking soda, activated charcoal, or dry coffee grounds left inside for several days help. Freezer liners hold odor longer than refrigerator liners do.
Does homeowners insurance cover food lost in a power outage?
Many policies include some food-spoilage coverage, often subject to a deductible or a stated limit. Photograph the discarded food and keep a list before disposing of it, then contact your insurer, since terms vary considerably between policies and providers.
An outage cleanup lands on top of everything else the storm caused, and the kitchen is rarely the only room affected. If you want the wider cleanup handled, get a quote or read more about house cleaning services.
