>I mean they built the superdome in New Orleans I assume partly to be a shelter

If they did, it was extremely half-arsedly done. CNN reported at one point that they never actually performed any tests on how much the structure was going to be able to take in the event of a natural disaster. I also remember seeing someone on the Something Awful forums posting that telling people to go to the Superdome wasn't likely going to be a good idea, because they weren't really prepared for anything more than a minor emergency lasting a few hours. There's a link for this ( http://news.yahoo.com/news?tmpl=story&u=/ap/20050829/ap_on_re_us/katrina_superdome_17 ) over there.

> , and they told people to go there, and it worked and the people who went survived.

Survived being killed by wind or water, yes. But then for some of them, maybe that might have been a better option.