Thanks for all the replies.we are probably just postpone the trip till later.
as someone who's Asthma was so bad for 4 or 5 years in my preteen/ teen year I had to spend 90% of my day laying down or I would turn blue, asthma suck big time I hope your DD start to feel better soon I hope that the Dr are able to find the right combo or just the right meds for her, and that she will be able to enjoy Disney soon.
if you still want to go here are a few things ( if her asthma was as bad as mine was there would be no way to go to Disney at all)
since the heat triggers her asthma
get to the park at RD
book FP starting around 10;30-12;30
as soon as you use your last FP see what FP you can find,
use the heat of the day to do indoor things or go back to the hotel to swim, maybe do an ADR lunch if you want to stay in the park
go back to the park if you leave abhor or two before the sun goes down.
things you can bring to help fain with a mister
cooling towel
hat or umbrella ( I like umbrella since they do not trap heat in but be careful of them)
she may do better in a wheel chair to save her energy .
You know your DD if waiting is the best thing then I hope you do not have to wait long to go back