[happyopossum]

As someone acclimated to warmer weather, I disagree. People work outside in 85, 90, 95° weather without health problems all the time. Hydrate and your body will acclimate.

[lotsoweiners]

I live in Phoenix and construction , HVAC, landscapers etc work in the summer here when it is 110+.

[bee_rider]

Depends on the humidity. Sweating is more efficient in less humid climates IIRC.