Clean, separate, cook, chill—and verify

Power Outage Food Safety: Refrigerator and Freezer Decisions

During an outage, the most useful information is temperature and time. Opening the door to smell each item spends both.

U.S. household guidance: These pages use USDA, FDA, and FoodSafety.gov recommendations. Local rules may differ. Pregnant people, adults 65 and older, children under 5, and people with weakened immune systems face higher foodborne-illness risk and may need stricter choices.

Prepare before the lights go out

Keep appliance thermometers in the refrigerator and freezer. The refrigerator should be 40°F (4°C) or below and the freezer 0°F (-18°C) or below. Freeze containers of water and gel packs, know where coolers are, and group freezer food so it stays cold longer.

Keep doors closed

FDA says an unopened refrigerator keeps food cold for about four hours. A full closed freezer holds temperature for about 48 hours; a half-full freezer for about 24 hours. Each door opening releases cold air and shortens that buffer.

If the outage will exceed four hours

Move refrigerated perishables to a cooler with enough ice or frozen packs to keep them at 40°F or below. Monitor with a thermometer. Do not place food outdoors: temperature changes, sunlight, animals, and contamination make it unreliable.

When power returns: refrigerator

Discard refrigerated perishable foods—meat, poultry, seafood, milk, eggs, leftovers, and similar items—that have been above 40°F for four hours or more. FDA notes that perishables measured at 45°F or below may be safe but should be cooked and eaten soon. Use the agency’s item-specific outage chart.

When power returns: freezer

If food still contains ice crystals or measures 40°F or below, it may be safely refrozen or cooked. Texture and quality may decline. A package that is fully thawed and has been above safe temperature too long should be discarded.

Do not use smell or taste as the test

Pathogenic bacteria may not create an odour. Never taste food to decide whether an outage made it unsafe. If time and temperature cannot be established, discard perishable food—especially for high-risk household members.

Floodwater is a separate hazard

Discard food not in waterproof containers if it contacted floodwater. Screw caps, snap lids, pull tops, and home-canned jars are not reliably waterproof. Follow FDA instructions for intact commercial metal cans and retort pouches; clean and sanitize food-contact surfaces and use a safe water supply.

Document the event

Write down when power failed and returned, indoor or outdoor conditions, appliance readings, door openings, and cooler temperatures. Photograph discarded food if an insurer or emergency program requests evidence.

Do not risk illness to avoid waste. A thermometer costs less than replacing a refrigerator of food and provides information before the emergency.

Sources and editorial boundary

GetMacros.net wrote and checked this guide against the linked government food-safety sources. Those agencies did not write, review, endorse, or sponsor this page.

Keep going: Use the storage helper and review freezer and refreezing rules.