And roy, There are also tornado proof/resistant homes in Wichita Falls Tx. in an area that was wiped out in the 80's. Cinderblock and metal roofs I think. And before I moved away, the trend in high-end homes was to put an above ground shelter in. Basically a concrete closet. When I commented 'nothing above ground s safe' that was indeed factually wrong. True in the case of standard construction.