Quote Originally Posted by enderlord99 View Post
Even 40 C is kind of surprising, considering that is (IIRC) the point at which most internal organs shut down.
If your core body temperature goes above 40C then you're suffering severe hyperthermia, which is life threatening, but your body is pretty good at regulating its temperature--you'd have to be in that sauna for quite a while before you ran the risk of elevating your core temperature to dangerous levels. Otherwise, nobody would be able to go outside in Qatar and similar places in summer!