I'd rather be traveling from North America to Australia than vice-versa.
I hate the cold. It's easier to avoid heat or cool down than to deal with the cold.
I worked in the goldfield deserts of Western Australia for years.
We often worked in 50C heat. Keep up the water intake and your body can sweat litres per day.
In the dry desert heat, your sweat evaporates rapidly so the body's heat is dissipated quickly.
Still, I prefer the moderate 25-32 range.
Some cold pics
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