Do you have engine block heaters in cars in Yukon? In Scandinavia we have electric heaters installed to engine blocks for people who keep their cars outside. The heaters are typically in the 500 W range and keeping it on for an hour before starting up the car in the morning makes the starting a lot easier.

We also have cabin heaters for cars (typically in the 1000 W range) but they are more for the convenience (but also safety, car windows are clear when you drive off, and vapor from breath doesn't condense and freeze to the insides of the windows).