1)Sleep in warm clothes: 2) Grab something warm as you exit - put it on later 30 keep warm by the smouldering coals of the burning building.

This would be a problem in regions that are less than polar. When the temperature drops below 50 F, one is at risk for hypothermia, especially if there is a breeze.

I have recently been tucking myself in at night wearing a fleece jacket with my key ring (car & house keys, flashlight, lighter, spare cash and PS4 multitool) zipped in a pocket. The fleece jacket is quite warm and retains warmth when I get up in the middle of the night, searching for the little room - doesn't show wrinkles, either. If I had to leave my bedroom in the middle of the night, I would be in pretty good shape.