I'd say we should start a new warning thread in Breaking News, but no one in danger has electricity and thus no internet access. So it wouldn't be of help.
There are going to be a lot more rescues required. Luckily there no longer is much of a storm surge, so the flooding won't be the guaranteed deadly 15-25' deep.
You can map any street here, with elevation contours:
http://terraserver-usa.com/
Can you map it on here and link it here? I just am not at all familiar with New Orleans.
http://maps.google.com/