This is incorrect as well, the wall shown was a Port facility wall, not part of the flood protection. The industrial canal walls had waves splashing over, there was minor erosion near a few R/R gate, but not much else. The New Orleans area is in good shape, the Grand Isle levee and one near Lafitte were breached, but not in the metro New Orleans area.
http://www.nola.com/hurricane/index.ssf/2008/09/corps_cites_areas_needing_quic.html

While we would prefer not to have another storm come this way, to say they cannot take a strong TS is both incorrect and could induce a panic which is unjustified.