Actually over the shear speculation of the storm, gas prices already jumped I believe yesterday or the day before, barrels were up $3-4 per. Let us not also forget that all of the off shores that were previously damaged and then folks sent back to those to work will be moved out again. Anything that Katrina missed and or damaged will sustain more of the same this time. I know in Tampa I have seen the prices spike a couple of cents the last couple of days. I would suggest filling now to avoid the increase and rush. Here is a site that will tell you the cheapest in your areas http://www.gasbuddy.com/