Unopened perishable food stored inside a standard refrigerator will generally remain safe to consume for up to four hours if the refrigerator door is kept tightly closed during a power outage. A full upright freezer can hold its freezing temperature for approximately forty-eight hours, while a half-full freezer will maintain safety for about twenty-four hours, provided the door remains shut. Perishable items such as meat, poultry, fish, milk, and leftovers should be discarded if held above forty degrees Fahrenheit for more than two hours. You can troubleshoot food safety easily by using a digital appliance thermometer. You can verify that your safety evaluation is correct when checking food temperatures and discarding spoiled items prevents foodborne illness during extended power outages.
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