For ppl in the south dealing with freezing temperatures there are a few things you can do to safely protect your home or rental from freezing damage:
Leave your faucets somewhat open. The flow will help prevent the water in the pipes from fully freezing and bursting.
Baking will help warm the house more safely than gas powered heaters. Plus it will leave you with food that won’t rot as fast without electricity. Do not EVER leave heaters going when someone is not present and don’t ever use gas powered ones indoors. If you light a fire in a fire place REMEMBER TO OPEN THE FLUE! It’s inside the chimney usually.
Smaller rooms heat up faster and longer. Many people in the same room will add to that. Hanging a sheet over the doors ( think dorm rooms or walk in freezers) will keep heat in when you have to open doors.
Layers are great to sleep in and will help (along with taking unused blankets or coats and adding them to your bed. Three layers of socks will help keep you warm at night.
Bubble wrap and other plastic sheets taped over windows will help keep the heat in. It’s also easiest to remove if you use painters tape. if it's really cold you can hang rugs up on the walls to insulate rooms.
Closed doors will help concentrate the heat in the areas you use. Close doors as you exit or enter rooms. Put rolled up towels or tape over drafts in doors in your house when you go to bed.
Candles produce more heat than you think but are very easy to knock over so think about where to place them. Ten candles all lit at the same time will heat a bitch up.
Any family or friends game with lots of movement (and high cal foods/alcohol for adults) will heat you and a room and help sleep through the night.
I spent many winters in a shitty built upstate New York house that had the doors and windows on backwards, almost no insulation, and mice eating holes through the walls. that’s my only qualification. There was a spring that somehow ran through my basement, wore a hole in the floor which I thought was a cement basement. There were blackouts in winter where the whole family slept in the same room to keep warm. Pretend you’re pioneers to make it fun for kids.