I have an EE and she lays beautiful green eggs- I also have orpis and in the summer it can get up to 120 here ..
last year about 117 was what we had. I say it seems hardest on the orpis - they are kind of chubby...
but with a mister and some fans they do OK.... make sure lots of fresh cool water and we do frozen veggies or melon snacks in the hottest part of the day.. I am in tucson
Do you have the self-blue or lavender orpingtons? That's what I am looking for right now.