1) The feds will provide better aid after doing a mediocre job with Katrina.
2) I think it will die down to a Cat. 4 or 3 upon landfall, so it should be a little weaker.
3) Evacuate yourself and your X5. If you can't, then at least park the X5 somewhere ABOVE ground.
4) Invest in a shop-vac which sucks water and/or a water pump from Home Depot.
5) Take out a second mortgage so you can fill up the X5 at $6 per gallon.