Eh, it is much much easier to keep warm when it's -40 outdoors than it is to keep cool when its 120+ outside. Unless you have a terribly insulated shelter, bla

Eh, it is much much easier to keep warm when it's -40 outdoors than it is to keep cool when its 120+ outside. Unless you have a terribly insulated shelter, blankets, coats, and friends will keep you warm enough to the extent that unless you are not really capable of taking basic care of yourself, you're not dying of the cold when your heat goes out. You can always do more insulation, and you only need so much for your body to keep you warm. With heat though you run out of things to do. There is a difference between an impaired person or a person doing something unwise dies of the heat or cold... and there being an environment where there's nothing a healthy adult can do to survive without powered heating/cooling.