This is a Yukon story. In desperation, stranded travellers torched their vehicle to survive. When it's -50C, strange things are indeed done ...

https://www.cbc.ca/news/canada/north/yukon-vehicle-fire-rescue-cold-1.5434069


And here are the recommendations of a bush-wise elder on travelling in such conditions:

https://www.cbc.ca/news/canada/north/yukon-road-trip-cold-tips-1.5431375