Found this link through Pop Culture Junk Mail blog

[wellah]

It shows how much of your major city would be under water if a similar flood hit of the same size as Katrina.

Here's Portland:
http://www.condobuzz.com/new-orleans-flood.php?img=portlandor&city=Portland

I'm about 15-20 blocks away from the water from my house, but all of downtown and inner east side is gone. Really interesting way to get some more perspective on the tragedy.