I spent six weeks last summer working in my place without AC because the AC had broken and for various reasons it couldn't be fixed right away. I can say for ce

I spent six weeks last summer working in my place without AC because the AC had broken and for various reasons it couldn't be fixed right away. I can say for certain that I did not become more tolerant of heat and my productivity was extremely low because I was lethargic all the time. I may have become slightly less uncomfortable in the heat but that didn't help with the lethargy.