One of the reasons that Native Africans can take the heat is the way that they are built. Tall, thin people radiate the most possible heat as opposed to Eskimos, who are more “spherical”, with minimal surface area, who retain as much as possible.
This is not “racism”, it’s genetic selection and the laws of thermodynamics.
I could go on with some reasons that this may not be working here in the US, but I think I might get into trouble.