New Orleans was doomed with or without Katrina, we just didn't know it. A good high tide puts more water in the canal than this. As the video shows, the water was barely higher than normal levels. The walls could have failed on a decent high tide.
From the looks of the video the fact the wall failed when Katrina was approaching was really coincidence. Yes, Katrina was the "final straw" but so could any winds from the southeast. Or any given winter storm. (we often get winds out the south that "stack" the lake far higher than this.) Indeed these same walls held much higher surges in the past; that is, before they were undermined by seeping water for a year.
Ironically the same flawed walls are incrementally safer now. We'll never have water seeping under them for a year and nobody doing anything. The flaw(s) is still there but now we can compensate for it more effectively. The right answer, of course, is to replace them.
What I will say next will probably completely throw you. Katrina saved probably over 50,000 lives.
I just don't know. It's damned troubling. Thanks for the link, Travis.
