I grew up in Maine and have memories of losing power for 10 days in a row. Supplementing with wood is already fairly normal just to save money. Even people who don't regularly burn wood or coal still keep a stove on hand for emergencies. When the power would go out we used to have a fire tending rotation to keep the temps high enough to stop the pipes from freezing. Heating your home is definitely of interest to just about every Mainer.