I guess I don't understand why in states where tornadoes are common, all housing should be mandated to have basements or old fashioned root cellars or weather shelters or whatever one wants to call them. Mobile parks should also be mandated to have a group type shelter. Especially now when the technology is so advanced that most of the time these phenoms scan be monitored well in advance and touchdowns pretty much forecast......might save lives....I live in Illinois and although not a regular threat, there have been times.........always lived in a house with a basement......