Keep the doors closed
Every opening releases cold air and shortens the window. Decide what is needed before opening, and avoid repeatedly checking by touch.
Appliance thermometers provide better evidence than the outage clock alone. Keep one in both the refrigerator and freezer.
Use coolers and cold sources
If the outage will exceed four hours, transfer priority refrigerated food to a cooler with ice or frozen gel packs while the food is still cold. Group frozen items so they retain temperature.
Use dry ice only when you can transport and handle it safely, following ventilation and contact precautions.
When in doubt, throw it out
Time above safe temperature, food type, and measured temperature determine whether an item should be kept. Odor and appearance cannot reliably identify dangerous food.
Follow FoodSafety.gov and USDA charts for the specific item. Never taste food to test its safety.
Frequently asked questions
Is food safe after six hours without power?
Perishable refrigerated food may require discarding after four hours without power or another cold source. Use official item-specific guidance.
How long is freezer food safe?
A full unopened freezer may hold temperature about 48 hours; a half-full freezer about 24 hours.
Can I smell food to see if it is safe?
No. Harmful bacteria may not change smell, taste, or appearance. Follow time-and-temperature guidance.
Sources and verification
We prioritize public-health guidance, official manuals, and manufacturer specifications. Always check the current manual for the exact model you purchase.