I'd rather trust these people than get stuck in a flooded emergency room or a shortage of medical somewhere else. At least everything you would need would be there at least for a little while. The food delivery trucks are probably filled with perishables or ingrediants. There's lots of bottled water and juice along with those cokes. A there's plenty of chlorinated water in the rides. The moat has water that can be boiled and used to clean the food from the garden. Same for the water rides in DCA. As long as you have something, I'm sure anyone with cooking abilty and camping skills could figure out something to do with it all. Have to eat the ice cream first though. I could think of worse situations.
Every Role a Starring Role - Disneyland Resort Nurses - YouTube