If I did live in a tornado zone, I’d become an expert on building underground homes. They can be quite attractive and lighter inside than one would expect.
I’ve often fantasized about building a home about 80% underground, with only a rounded window showing at the top half of a room around the parimeter facing east, south, and west.
Not only could this provide a good light source, you could watch sunrise and sunset. The part underground would have an excellent source of insullation also.
Fiber optic light syncs could provide all the light you needed during the daytime, and rechargable batteries or other sources of recharging could light the place at night.
I’ve also thought that I would run a duel system of wiring through the structure so that twelve vold lighting could be used throughout to cut on energy consumption. You don’t really need fully lighted rooms at night. Most could do fine with low level parimeter lighting, with only one room well lit.
I like the idea...