Never vent a clothes dryer into the house. It is a safety hazard. In addition, venting indoors adds harmful dust, lint, and moisture into the air and actually lengthens the drying time. Never use electric or gas ovens for heating a home during a power outage. Use a fuel burning heater, fireplace, or wood stove as a heat source.
Fuel burning heaters require proper ventilation to prevent harmful fume buildup.
A fireplace or wood stove should never be left unattended. Be sure they are vented through a flue or chimney with the damper fully open. In addition, open the water faucets slightly to prevent the pipes from freezing, dress warmly, and hang cardboard or blankets over the windows and doorways to minimize heat loss.