pics of some of the structural collapse in N.O.:
http://hosted.ap.org/dynamic/files/photos/L/LADM10908291450.html?SITE=CADIU&SECTION=HOME&TEMPLATE=DEFAULT
http://hosted.ap.org/photos/L/LADM10808291449-big.jpg
(I believe they're small enough to post, but didn't want to risk it.)
Those older brick buildings aren't built for this kind of abuse. No surprise they fell.