If gas is cut off, but you still have electricity, use electric skillets, hot plates, or coffee makers to heat food. Candle warmers and other devices , such as fondue pots, may be used if no other heat sources are available. Use safety precautions with these devices. Never use fuel burning camp stoves or charcoal burners inside your home, even in a fireplace. Do not cook frozen foods unless you have ample heat for cooking.
Most frozen foods require considerably more cooking time and heat than canned foods.
Also, if power is off, it is best to leave the freezer door closed to keep food from thawing. Substitute these for water in cooked dishes. Drain and save juices from canned fruits. Substitute these for water in salads and beverages. If you are without refrigeration, open only enough food for one meal.