Was Katrina God's Judgement?

It's a question I have been mulling over for the last several days. Was Hurricane Katirna God's way of judging a thoroughly decadent New Orleans? A friend of mine had posed this question to me shortly after the hurricane had made landfall. Since I had visited New Orleans last fall on a business trip and had observed some of the city's infamous culture firsthand the question seemed to be a sensible one. But the more I reflect on the issue I have to wonder whether it was or not. This post by Michael Russell at Theologica (a new World Magazine blog) leads me to believe that it wasn't based on the pattern of God's judgements revealed in the Bible. What do you think?