It's Not Just New Orleans
There is extensive damage in the eastern part of St. Tammany Parish (particularly in Slidell) and in the lower half of Plaquemines Parish.
Today residents in Jefferson Parish were allowed to return home, to collect belongings, but they are asked not to come back again for one month.
Tonight I saw what I believe is the first TV news footage shot on the ground in St. Bernard Parish (on ABC's World News Tonight). Apparently most of the parish was under 15 to 20 feet of water -- given its spot between Lake Borgne and the Gulf, there was a lot of water for Katrina to blow in.