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Food Safety & Power Outages

Preparing your fridge or freezer for a possible power outage

At the first news of inclement weather, consider taking these precautionary measures from the USDA, listed below.

  • Keep an appliance thermometer in the refrigerator and freezer. An appliance thermometer will indicate the temperature in the refrigerator and freezer in case of a power outage and help determine the safety of the food.
  • Make sure the freezer is at 0 °F or below and the refrigerator is at 40 °F or below.
  • Freeze containers of water for ice to help keep food cold in the freezer, refrigerator or coolers after the power is out.
  • Freeze refrigerated items such as leftovers, milk and fresh meat and poultry that you may not need immediately—this helps keep them at a safe temperature longer.
  • Plan ahead and know where dry ice and block ice can be purchased.
  • Have coolers on hand to keep refrigerator food cold if the power will be out for more than 4 hours. Purchase or make ice cubes and store in the freezer for use in the refrigerator or in a cooler. Freeze gel packs ahead of time for use in coolers.
  • Group food together in the freezer—this helps the food stay cold longer.
  • Store food on shelves that will be safely out of the way of contaminated water in case of flooding.

If a power outage has already occurred

Follow these USDA recommendations for safe fridges and freezers after a power outage has occurred.
  • Keep the refrigerator and freezer doors closed to maintain the cold temperature. The refrigerator will keep food safely cold for about 4 hours if it is unopened. A full freezer will hold the temperature for approximately 48 hours (24 hours if it is half full) and the door remains closed.
  • Discard refrigerated perishable food such as meat, poultry, fish, soft cheeses, milk, eggs, leftovers and deli items after 4 hours without power.
  • Food may be safely refrozen if it still contains ice crystals or is at 40°F or below when checked with a food thermometer.
  • Never taste a food to determine its safety.
  • Obtain dry or block ice to keep your refrigerator and freezer as cold as possible if the power is going to be out for a prolonged period of time. Fifty pounds of dry ice should hold an 18-cubic-foot full freezer for 2 days.
  • If the power has been out for several days, check the temperature of the freezer with an appliance thermometer. If the appliance thermometer reads 40°F or below, the food is safe to refreeze.
  • If a thermometer has not been kept in the freezer, check each package of food to determine its safety. If the food still contains ice crystals, the food is safe.
  • When in Doubt, Throw it Out!