Why are all of the trunks open?
Electrical latches shorted by the high water? Maybe?
Just guessing the water pressure popped them open.
I was wondering about the trunks, too. It looks as though the water pushed through the cars and popped them open. I thought it was interesting that the trunks on the shore side were more open than the ones across from them. Perhaps a difference in wave action or wind direction.
Well, N'awlins is called "The Big Easy", so they must have opened their trunks to make it easier on the looters!
Low air pressure from the hurricane eye maybe?