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Guides · 4 min read

Food safety during an outage

A closed refrigerator keeps food safe for about 4 hours. A full freezer holds a safe temperature for about 48 hours, a half-full one about 24. The rule that matters most: keep the doors shut.

Before the outage

  • Put an appliance thermometer in both the fridge (40°F or below) and the freezer (0°F or below).
  • Keep the freezer full. Frozen jugs of water fill gaps and double as ice for a cooler.
  • Have a cooler and ice packs ready for medicines and essentials.

During the outage

  • Open the doors as little as possible. Plan what you'll take out before opening.
  • Group frozen food close together so it stays cold longer.
  • After 4 hours, move milk, meat, leftovers and medicines into a cooler with ice.

After the power returns

  • Refrigerated perishables (meat, poultry, fish, eggs, milk, leftovers) above 40°F for more than 2 hours: throw them out.
  • Frozen food that still has ice crystals or reads 40°F or below can be refrozen or cooked. Quality may suffer, but it's safe.
  • Check each item on its own. Never taste food to decide whether it's safe.
When in doubt, throw it out. FoodSafety.gov keeps detailed charts by food type.
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Sources