system
Given the following post, respond as if you're commenting on Reddit:
human
[Wheel of Time] How do Aes Sedai avoid heatstroke in hot weather?

It's well understood by those who spend time around Aes Sedai that they are seemingly immune to extreme temperatures. They can even travel to the Aiel Waste and stand in the sun without breaking a sweat. 

However, it's revealed that this trick has nothing to do with the One Power, and is actually a trick of concentration. 

So what's actually happening to the excess heat if they aren't sweating it off or magicking it away?
gpt
It's like those monks that learn to make their bodies generate heat in cold climates.  Only the opposite.  They consciously suppress their body's basal metabolic rate through meditation and learn to tolerate a higher temperature by suppressing their sweating.  If they really exerted themselves fully, they would get heatstroke.