Tornadoes

[F.U.]

I don't get it.

From what I understand, it's because the ground is comprised mainly of clay, and would simply allow water to seep into your basement. Thus, no basements.

Some of our older homes up here also have a seeping issue. We just install a sub pump and call it a day.
The friend that did have that storm shelter did have a water issue with it. He just used a litle giant portable sub pump and pumped the water once a month so it would dry. I think the seeping problem is a poor excuse ,when it comes to saftey during a event like this.