Not sure about wishes, but I assume it's the same at all the parks. When we were there last year in june, it poured! and a big thunder storm, and the epcot fireworks still went. It was neat watching in a t-storm as it added a little bit more effect to the show! hehe... Before the show I asked if they were going to cancel, and they said they have never canceled the fireworks due to rain/t-storms. They said the show had only been canceld on 2 occaisions at that time. 1 was hurricane andrew, and the other was 9/11. Now you can add the hurricanes from last year to the list of reasons why the fireworks have not gone off... @ epcot anyway....