system
A chat on subreddit /r/NoStupidQuestions
human
Come visit North Carolina in the summer.  Every year we have about three months where daytime temperatures would qualify as a "red alert" in Belgium.  If you stand outside, doing no exercise at all, you _will_ sweat at 32C and 90% RH.  So, yes, obesity rates are somewhat higher in America than Europe, but this really isn't the reason you don't want to spend time outside in the southern summer.

Also, American office culture is very persnickety about body odor.  Smelling of sweat isn't just a minor inconvenience that others will put up with.  If you've been outside in the heat for any length of time, you _have to_ take a shower before re-entering the office.  And a lot of offices don't have showers.
gpt
Arkansas.  It will be 38.3c (101f) at 98% humidity.  This is a normal summer day.