Yer, scorpions (well desert species anyway) are highly resistant to drought/dehydration because of their many adaptations i.e. impermeable cuticle, ability to close book lungs etc. They will survive quite happily until they reach that tipping point of 50-65c at which point they will suffer the symptoms i quoted above.
I wasn't saying that they are prone to dehydration just that they are so good at surviving extremes of heat until a certain point. Then they do the weird stinging itself thing and then die which amazes me lol. Apparently if you put a supposedly dead scorpion into water after it has been exposed to those temps it usually revives with no ill effects. Absolutely amazing lol. Scorpions are crazy animals.
Cheers for the link. Have saved it as it looks like an interesting read