After a bit of a hiatus (due to a month-long winter cold), I finally went back to hot yoga. This time, I had a really difficult time with the heat. I started feeling out of it, and had symptoms of heat exhaustion. My skin was tingling, but not in a good way. I stepped out of class and got a cold shower to reset my body temperature. My face was beet red before I finally cooled down.
No matter what they tell you - if you start to feel sick in hot yoga class, you need to leave the room and cool yourself down. Heat exhaustion can be very serious.
Fortunately, the hot yoga studio I go to is supportive of students needing to take care of themselves. They check in on you and don't berate you if you need to leave the room. That's positive, especially for people such as myself who have a tendency to get overheated for whatever the reason.