It’s all based on experience at actually working under these conditions, and if you’re equipped for them as well. Even as a caucasian, I worked out in heat waves for the early 2000s, just like now, we had our power outages, heat wave weeks in Delaware around the first week of July like we have now, and so long as I had about 1 gallon of water and about a gallon of Gatorade, I could take just about anything, or so it seemed. At any rate, I just adapted enough to take on hourly work in construction after I graduated from college and was trying to get into a job related to my field in Environmental Studies (misnomer in the major, I specialize in detecting pollution, and not “climate science”), anyways, I was willing to do something that paid me a salary, and figured that as long as I could brave the heat, save some money, and have some work and learned skills to show for the time I spent looking for a job for my educational level, it was worth it, and eventually, it turned out to work. Either way, any sufficiently determined person can take the heat amazingly well, indiscriminate of who they are.