I've pondered this issue many times , as I, too, live in the Great White North (aka Canada).
I'd like to hear from as many members as possible on their ideas to keep things warm in a power outage.
Short of a generator I've considered and have used a few of these methods.
... using a car to keep things warm is dangerous , but can be done safely if you ventilate the interior and use a second person as a check and balance
... I keep empty plastic pop and water bottles around , as these can be filled with hot water from the water heater and placed around a room or closet to keep the temperature up...
... if you only have one or 2 chams, maybe worth having a styrofoam lined box available for each and some heat packs as an emergency backup. Heat packs cost about a buck or 2 each...
.... With proper ventelation, a kerosene heater might be worth having around. Again , this is potentially dangerous and should have 2 people involved...
....Any room with a fireplace , can be curtained off and used with a wood fire for heat....
... if you only loose electricity, any gas hot water heater should remain functional through out the outage....
...if the gas , to the house is lost , then electric space heaters, the kitchen stove, any electric hot water heaters are all sources of heat....