I went to DHS First Aid to get aspirin , they gave us some and I could see the several portable beds staged with guests lying down in the AC dealing with heat exhaustion. The heat and humidity during the summer at WDW is nothing to joke about.I wish my wife felt the same way. I seem to do ok weather a big chilly(though once in November I found myself buying one of those burlap like ponchos in Mexico as the only warm thing under $50 for sale in Epcot) not does heat bother me, but been in late August and mid June and my other family members do not love the humidity and heat. My Father in law almost passed out just walking into Epcot(he was pushing his wife in a wheel chair and refused to drink more water and let us help).