What If Your Furnace and Electricity Go Out?

This guy shows how to make a lamp/heater using a Mason jar and copper pipe that can both give basic illumination and heat.  He recommends using denatured alcohol but demonstrates that 70% isopropyl (rubbing alcohol) works just fine.

You could make these in advance but you can also make these once disaster hits if you still have a working cordless drill, a Mason jar, some pipe, and a way to cut the pipe.