I didn't ask if you had a fireplace. This is a basic concern because if it is very cold and the power is out you will need to act fast. If you live in an area that is prone to snow storms and or power out in the winter situations. Here is my advise.
Keep on hand at least 5 railroad ties (cut up or built into a wall). The creosote in the ties makes them burn well, makes them waterproof and causes them to throw tons of heat. (smelly but warm)
In a winter power outage in the north move quickly. If you live in a city and the guy next door has
a RR tie wall around his driveway you win. If you live in the country I doubt you need my advice but think about the ties they burn long and hot (like coal)
DO NOT COOK ON A RR TIE FIRE