[eastforker]

BS. Iron and concrete would make a bunker no tornado could penetrate.

[GeronL]

Just hardening an existing room in a school or house won’t cut it though

[Netz]

Yes but why don't we see many above-ground, reinforced steel & concrete tornado shelters? Cost? Less safe? Not sure. What do you think? Why is your concept not applied in the fields of Oklahoma? I saw pictures of survivors emerging from classic, two-door underground shelters...the kind that Dorthy ran to in the Wizard of Oz...