How Long Does Food Last When the Power Goes Out?
Use temperature and time guidance rather than guesswork.
Protect cold food
Ready.gov says a refrigerator keeps food cold for about four hours if kept closed, while a full freezer can hold a safe temperature for about 48 hours. Use a thermometer when possible.
Store practical food
Favor shelf-stable foods your household already eats, with manual-opening and preparation methods that do not depend on grid power.
Treat water as a system
Store drinking water, know local advisories, and plan for people, pets and sanitation—not just a few bottles.
Cold-food timing
Ready.gov says a closed refrigerator keeps food cold for about four hours and a full freezer for about 48 hours. Food safety still depends on actual temperature, so a refrigerator/freezer thermometer is more reliable than guessing.
What to do next
Turn this topic into one or two concrete household actions. Preparedness works better as a maintained system than as a one-time shopping list.
Related guides
- Emergency Water Storage: A Practical Guide
- Emergency Food Storage for Power Outages
- How to Cook During a Power Outage
- David’s Shield review
Ready.gov power-outage and preparedness guidance; NOAA Space Weather Prediction Center for geomagnetic-storm/grid information.