Hi there, Jennifer!
Unless the weather is quite severe, as determined by Cast Members, most events will continue as scheduled. Obviously, if the Cast Members determine that if there is any potential danger to the health, safety, and well-being of a Guest, the event will not take place.
If an outdoor or partially outdoor event - like
Mickey's Backyard BBQ or
Pirates and Pals Fireworks Voyage - is cancelled at the decision of a Cast Member, you will either be reimbursed if your credit card was billed, or not charged at all, depending upon the payment policy in place.
Have a wonderful trip - and stay dry and safe!
See you later, celebrator,
-Deborah B.