If the heat situation is not resolved by your landlord Dollar Dollar Bill Kirill shirt, I would suggest you move. It’s not fair to you and, certainly not fair to the cat. The cat doesn’t have a choice. During my residency, I was sent to do dental OR’s in Churchill Manitoba, and after I completed my residency, to make money to pay off my student loan and pay for grad school, plus some adventure, I moved to Churchill Manitoba, which has the best polar bear watching. The bears congregate outside Churchill waiting for the sea ice to form so they can go out hunting. Until then, they hung around town, especially the dump. Very few people get eaten. Did that for a year and then went to grad school? I survived. Went back up during the summer to work in a clinic Rankin Inlet to pay for school.
Talk to the experienced staff at your local outdoor retailer/outfitter about suitable clothing for your planned activities. Check the weather forecast before you leave. There are many tricks and tips for staying warm in cold conditions, they can take a while to learn and are best learned through experienced friends and then your own personal experience. It can be very satisfying partaking in activities in the extreme cold, without actually becoming cold yourself! However, there are also very real dangers and these should not be ignored or overlooked. I’ve had mild hypothermia as well as having to deal with it in others in a group situation. I’ve also treated frostbite and seen the results of it untreated (very bad). I have camped in much colder highs. For lows, it is even easier. You just need to be prepared. I usually don’t use heat when I camp but most would. I just use really good insulation. Boots from Antarctic use.