We don’t have a fireplace, but we have coats and sub-zero camping gear ;-). Hunting is just not going to be a possibility for most people, even if it were legal.
Twenty years ago, when I was toward the end of a high-risk pregnancy, we had a major ice storm. There was no electricity for five days, and no way to drive out of the neighborhood because so many trees were down across the roads. I could hike out due to my pregnancy—I was very awkward anyway, and could not risk a fall.
It was very cold because we didn’t have a fireplace or woodstove. My husband hiked out and brought supplies back with great difficulty, but I was really miserable. I swore I would never again live in a house with no independent source of heat. And I have kept my oath.