With all that water, I have to think a lot of merchandise in the stores are already damaged. No point in looting a big screen TV that's been under water.
I lived through the Los Angeles riot of 1992 and saw some very stupid things. There was this vending machine that had been burnt inside a building. Some guys dragged it out and were trying to hammer it open to get the coins. There was another incident (saw on TV) where some guys chained the back of their truck to an ATM machine and tried to pull it out. It took the rear bumper off the truck and they kept going -- leaving the rear bumper, complete with license plate attached, behind.