Keep refrigerator and freezer doors closed as much as possible. First use perishable food from the refrigerator. An unopened refrigerator will keep foods cold for about 4 hours.
Then use food from the freezer. A full freezer will keep the temperature for about 48 hours (24 hours if it is half full) if the door remains closed.
If it looks like the power outage will continue beyond a day, prepare a cooler with ice for your freezer items. Inexpensive Styrofoam coolers work well.
Protect your electrical equipment.
Turn off and unplug all unnecessary electrical equipment (except your refrigerator and freezer).
Turn off or disconnect any appliances (like stoves), equipment, or electronics you were using when the power went out.
Leave 1 light turned on so you’ll know when the power comes back on.
Safety tips for using backup generators.
Use generators only as independent power sources. Keep them outside and run a cord inside. Don’t connect generators to main service panels. This could injure or kill utility workers trying to restore power.