There is a video link that shows where Trump was to those affected. From article:
“all those affected were seated on the left side of the stage, just steps away from where Trump made his entrance.”
“The footage clearly shows Trump walking onstage, with the area directly behind him filled with people who would later report alarming symptoms.”
A faulty AC or lighting issue could cause eye irritation but unbearable heat and peeling skin ?
I found it a bit after I spoke...thanks