[raydiatian]

100C? Where we boil water? ;)

[MobiusHorizons]

Yes. Actually 100C. The sauna i usually go to goes up to 240F (115C). The reason this doesn’t immediately scald you is that air has a tiny fraction of the specific heat of water, so the energy being transferred to the skin is at a much lower level. You can reject a large portion of this heat by sweating

[jks]

There used to be a Finnish sauna endurance competition where the temperature was 110℃. It was canceled in 2010 after one contestant died.

https://en.wikipedia.org/wiki/World_Sauna_Championships

[KeplerBoy]

It's not an issue. The dry air insulates fairly well, so your body heats up slowly and you can last a few minutes.

[wongarsu]

Also in dry air evaporation cooling is very effective, so sweating gets rid of a lot of the heat before it can build up in your body