Wait...it is 105+ degrees outside, what cool air is flowing under her??Not a good time to let a broody set. The eggs will bake with our temps and you'll want to break your broody girls. I have a Blue Copper Marans in a wire floored dog kennel under my grapefruit tree right now to break her of her broodiness. The wire floor allows for air to flow under her as well to cool her down. I have my livestock fans running continously right now so that should help. I also put a frozen water bottle in with her. Usually breaks them in 3 days. If you need to hatch eggs use the incubator.

I've used various methods to break broodies. The method used by @ChuskaMtns , wire bottomed cages work well most of the time but I hate to do that to them when it is so hot out since they can't cool themselves by digging in the dirt. I've moved them into a different pen with a bunch of "strangers" and that sometimes breaks them up, other times, they see the nest box in the new pen and it looks just dandy to them, so they move right in and continue broody behavior. I've put them in with aggressive males, so if they want to sit, the male takes that as an invitation to mount, which doesn't go over well with the hen. I've used the for sale method and the axe method as well if they really get to me.