yea I know they aren't people but all creatures are made from the same basic stuff, use the same basic chemistry, and are designed to live in roughly the same environment (give or take a few degrees depending on location).
I've had issues with my warm side getting up to 105 but no sign of burns - he just has to come out to cool off periodically. I kind of like that he has to thermoregulate because then I'm sure he can get as hot as he wants. But, I think 105 is too high and i've been adjusting it downwards. That just got me curious if it was known at what point snakes started to get burns.