Unopened perishable dairy products like milk 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. Once the internal temperature of the refrigerator rises above forty degrees Fahrenheit for more than two hours, harmful bacteria can multiply rapidly, making perishable foods unsafe. You can troubleshoot food safety easily by using a digital appliance thermometer placed inside the refrigerator compartment. You can verify that your safety evaluation is correct when checking food temperatures and discarding spoiled milk or perishable items that exceeded safe temperature thresholds prevents foodborne illness during extended power outages.
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