Andy Carvin, director of the Digital Divide Network, recently posted a fascinating, heartbreaking perspective just how much damage has been done. He found the images at a strange condo site, condobuzz.com. The images are overlays of the flooding with other metropolitan areas. (Note this is just the flooding. The hurricane damages, if in the midwest, would reach from Detroit to Chicago.) Andy's excellent, popular, collaborative Katrina blog is here: http://katrina05.blogspot.com/
Below are Washington and Winston-Salem, NC. (My native state.) Click to enlarge.