If your ticket was issued no later than Aug. 27, and you were scheduled to travel between Aug. 27 an

Tropical Storm Isaac has entered the Gulf of Mexico and the Hurricane Forecast Center is preparing to upgrade the storm to a Category 1 Hurricane. Hurricane rental car prices Warnings are in effect across the Gulf states as there is still a cone of uncertainty as to where it will hit.
Passengers with tickets to/from the above cities between August 26, 2012, and August 30, 2012, may reschedule their flights for travel no later than one year from the date of issue on the ticket without any charge.
If your ticket was issued no later than Aug. 27, and you were scheduled to travel between Aug. 27 and Aug. 30, you may make one change, with no additional cost to your ticket, and you can travel between Aug. 27 and Sept. 2.
If your flight is cancelled , this provides you, the consumer, with additional options. One option is canceling the ticket(s) and getting a full refund. If you wish to travel, you may have additional flexibility when it comes to your new dates of travel.
Should you have any prepaid, non-refundable travel items such as hotels (i.e. priceline bid, hotwire) and no travel insurance, you can try to work with them. If you have travel insurance, such claims are typically straight-forward.