If you've lost power for a prolonged period, follow these tips regarding food safety from the Baltimore City Health Department:
•Keep the refrigerator and freezer doors closed as much as possible to maintain the cold temperature.
•The refrigerator will keep food cold for about four hours if it is unopened.
•A full freezer will keep the temperature for approximately 48 hours (24 hours if it is half full) if the door remains closed.


