apologies if this has been posted already, but it is hard to keep up with it all in the current events forum. this overlay was made using a DigitalGlobe image and is provided under a fair use license. the image is large so you'll have to wait patiently for the download.

image retrieved from: http://www.digitalglobe.com/images/katrina/new_orleans_msi_aug31_2005_dg.jpg