The Port of Southern Louisiana is the fifth largest port in the world according to wikipedia. Between that and I-10 looking like somebody went after it with a ginsu knife, the economic impacts of this thing could be far reaching (the human toll is already horrid). Some are speculating that the loss in import capacity could make $3/Gallon gas look like the good old days.
Again, the real concern is the people affected, but what happens when the economy takes a beating, and the +1million storm victims have to pick up the pieces in the middle of a recession. The economy wasn’t that good to begin with.