Weve had 7 to 25 degree weather the last 6 weeks. If our power went out even for a short time we'd be in trouble. We have electric heat and no fireplace or wood stove. What would be a good, safe source of heat I could keep avalible just in case? I do have a camp heater that runs on white gas that I've used before but I had a huge house back than. My present place is a small 2 story, 900 ft each floor. What would work?