I'm pretty sure I've heard in the past that if Disney truly cancels the party, they will either offer you a ticket for a different party or a refund, but you do have to go to Guest Services and actually ask for it to get one of those accommodations. But I've also heard that they don't really cancel the parties unless it really is a hurricane, so it seems likely we will just be very wet trick-or-treaters who may or may not get to see the parade or the fireworks.