Define "Hot as hell". Parts of the US are pretty brutal. The southern half of Arizona can be 115+ degrees from May through the end of September. Parts of Texas can easily be above 100 degrees for several months on end. Louiana, Alabama, Miss, and Florida can all be in the mid 90's or higher with suffocating humidity. That's no walk in the park.
Dry heat is different that heat+humidity.
I guarantee you Nigeria is worse than any part of the US. My "home" is in southern TN. I have been to most hot places in the US. Also to Iraq and Afghanistan through the summer on deployment. I have a picture of a thermostat at over 120 in Afghan, then another picture of the thermostat busted because it was maxed out. The US is not that hot comparatively. Especially since AC is virtually everywhere. Nigeria is fucking brutal, because it has extremely high humidity and the sun is on another level here. It seems every place I go with the Marine Corps is hot. Senegal last year in July, ugh. I was in Djibouti last month, possibly the only place hotter than Kuwait I have ever been in. Fucking miserable.
Edit, not only that, but we have to take anit-malaria pills. Side effects are, dehydration, diarrhea (becasue the food here doesn't already do that), etc. Combine that pill, WITH the heat? I don't want to hear about your 115f.