I remember last September 17, when what was left of Hurricane Ivan hit Pittsburgh. The remnants of Hurricane Frances had rolled through town a little over a week before, dumping more rain in a twenty-four period than had ever been recorded before.
Ivan broke that record. Easily. And since the ground was already saturated, it resulted in the worst flooding this area's seen in over thirty years.
Now imagine, if you can, what it would have been like if Pittsburgh lay twenty-five feet below sea level with major-sized lakes on three sides, a river delta on the fourth, and a full-fledged hurricane hitting.
That's what it's going to be like in New Orleans in about five or six hours.
According to Paul, who blogs over at http://wizbangblog.com
, if Katrina hits at just the wrong angle, as it now appears it will, the resulting storm surge, coupled with torrential rain, could put much of the city under ten to thirty feet of water, with nowhere for it to go. It could take anywhere from ten weeks to ten months to drain off or pump it out of the natural bowl that much of New Orleans lays in. But no one knows for certain; they've never done this before.
So if you've got a deity that you're on good terms with (I don't), I suggest you try hooking up with him/her/it and seeing what he/she/it can do. Those people are going to need all the help they can get. And as my (grand)Pappy would say, "It can't hurt."