As the USDA notes in Keeping Food Safe During an Emergency, your refrigerator will keep food safe for up to 4 hours during a power outage. Keep the door closed as much as possible. Discard refrigerated perishable food such as meat, poultry, fish, eggs, and leftovers after 4 hours without power.
After a power outage never taste food to determine its safety. You will have to evaluate each item separately—use this chart as a guide. When in Doubt, Throw it Out!
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