I have the same problem here. On my balcony is also a sauna: over 30C during the day. Sometimes 38C....
Some species are fine, but I have to mist them a lot and water frequently. They are growing a lot even in these condition. The advantage I have is the cooler nights: below 30C.
If you see signs of severe dehydration, than is a reason to bring them inside. But because you growing them in s/h, from my point of view, they will be fine. I have a catt in s/h outside and it is very happy.