Back to the subject of this thread (writing songs, or parodies of songs, about this inundation)...

To the tune of "Battle of New Orleans":

In Twenty-Oh-Five, Katrina took a trip
From Florida by water to the mighty Mississip'.
She took a little spin and then she took a few careens
And she looked and set her eye upon the town of New Orleans.

We cried our lungs out; Katrina kept a-comin'
A higher category than she was a while ago.
We cried once more and we began to runnin'
Up the Mississippi from the Gulf of Mexico.

(more to come)