Breathing per se should be fine. If you've ever been in a sauna, you'll know you can breathe air even when it's above the boiling point -- not for very long, to

Breathing per se should be fine. If you've ever been in a sauna, you'll know you can breathe air even when it's above the boiling point -- not for very long, to be sure, but that's got more to do with the extreme rate of sweating than your lungs. The lungs are always wet, which keeps them cool from evaporation.