YouTube presented a video on one of the coldest cities - Yakutsk in Eastern Russia. Cars stay running all the time to stop them freezing, bare skin gets frostbitten in ~15 minutes, market traders keep meat in the open air because it's frozen solid. One native in this video says -40C doesn't register as cold, she doesn't feel cold until -52C, and she wouldn't want to leave. 300,000 people live there.
https://www.youtube.com/watch?v=Fz4ZMLsPzqM