It is amazing to see the temperature environments that humans have adapted to and live in. It's a process called acclimatisation. Just think about the local environment you live in and compare it to the evironment of another of our members. I once was aclimatised to the colder environment of the NSW Southern Highlands. When I lived in Sydney after that, I didn't need extra heating for my bed because I did not feel cold in Sydney. This summer I have lived through temperatures in the high 30s, but the humidity has been about 18%. I could not handle 30 degrees on the Queensland coast because of the humidity.
People who live in the high latitudes of the Northern Hemisphere can handle temperatures that we in the mid-latitudes would not care to contemplate, and vicky-versa.