Infographic from FEMA
Generally, a refrigerator can keep temperature without power for around 4 hours. A full freezer can hold temperature for approximately 48 hours. These times decrease if the doors are opened. As a general rule, if there is doubt – then throw it out!
The key to food safety following a prolonged power outage is to ensure the temperature of food stay at 40 degrees or below. Food in a freezer may be safely refrozen if the food has ice crystals or stays below 40 degrees.
For food in refrigerators, a good rule of thumb is to throw out anything that has been above 40 degrees for 2 or more hours. This includes meat, poultry, fish, lunch meat, milk, and eggs. For more information, View the U.S. Department of Agriculture’s Keeping Food Safe in an Emergency Page.