I was at DL yesterday. It was very warm, about 91 degrees. At about 5 a breeze kicked in which felt very nice because it was a cool breeze and overall it helped to cause the temp to go down a bit.
Unfortunately, this breeze continued up to the time the fireworks were supposed to start, and the show was cancelled.
I understand they do this mainly because DL is so small and there are hotels literally beneath where the fireworks go off at. High winds may cause fallout to land on people or structures, causing potential harm.
Does this ever happen at WDW? Or more specifically does WDW ever cancel their fireworks show due to high winds (or in the case of DL, strong breezes)? Or are there other weather conditions at WDW that may cause their show to be cancelled? I wouldn't think winds cause cancellations at WDW simply because it is a huge area but I could be wrong.