Trapping Rita into a corner ?

What should we make out of the fact that the strike probability of Rita has moved West ?
On september 21, warm water was all over the Texas coast.
A day later, that warm water has shifted West.
Could it be that because of the evacuation of the population from the coast and Houston in particular, warm water rejected into the river stream (houston channel) and on the coast has decreased to the point where other locations on the coast are warmer ? If this is indeed a possible explanation, it is not the best move to have it hit a part of the coast where most refineries are.
On the other hand, if it means that flooding won't occur in Galveston, I am all for it.