In MK, Splash Mountain, Big Thunder Mountain Railroad, Dumbo, Astro Orbiter, Jungle Cruise, Aladdin, Goofy's Barnstormer, and the Parades and fireworks.
In Epcot: Test Track (closes if any rain is present), Illuminations
MGM: Indiana Jones, Backstage Tour
Animal Kingdom: Triceratops Spin, Primeval Whirl, Kali River Rapids, and my guess is that they may not have Kilomanjaro Safari, depending on how severe the storm... wonder if anything will change with the unfortunate death of that giraffe last week?
All attractions within the water parks.
All watercraft.