I don't think the soil here supports basements. I am not for sure. I can't think of a single house that I know of around here that has what you would call a "real" basement where it is entirely underground. There are some that have a lower level that is partially covered by a hill or landscaping, but not entirely under the ground. We have really heavy clay soil and have a lot of problems in the really hot dry (drought) summers and really wet springs with the ground shifting. So I think it is a structural issue.
We do, on the other hand, have a plethora of "Hidey Holes" or "Fraidy Holes" aka storm shelters. They are very small and only big enough for a small number of people to get in, and it is not for long term. The older ones are concrete and might have room for a built in bench. You can see them as you drive by...they have what looks like an attic fan thing on top for air circulation. A lot of houses don't have them. You find them more in the rural areas.
The newer houses are having "safe rooms" built in them. These are more for Tornado safety than home invasion, but are dual purpose.
DH is a pipeliner. He was up in Alaska, with a group of welders. Most welders up there were from Texas, Oklahoma, Louisiana. The sky turned that "special" shade of green and they looked up and saw one overhead. It was never reported. DH asked, "Does everyone see that? Is that what I think it is?" And they all watched as it hopped along the ground. It was a really small one.
The kids get a kick out of the whirling dervishes (or dust devils). My DD (14) screams when she sees one because she thinks they turn into tornadoes (she's a little high strung! LOL!) But, we've seen some HUGE ones - several stories high. They are really fun to watch. You kind of get the fluid motion of the tornado, without the destruction. Of course, you get filthy! LOL!
Shelly