But it’s a dry heat...
Yes welders working in the sun nod keep working sounds like the old boy may have had other issues?.
I’m about the only male in 3 generations of family who hasn’t worked in 300 degree asphalt
My son runs a roller and paver with only an umbrella for shade
I really don’t much like it when he’s working on interstates with trucks running past him just a few feet away from where he sits
I don’t know what health issues the driver might have had, but not urinating for a long period means you’re severely dehydrated (well, there’s also prostate trouble, but that’s a different matter).
I used to work in open-pit copper mines here in Arizona, where the temps at the bottom of the pit would routinely get over 120 in the summer. Heat disorders were all too common, and one of the standard safety topics was how to recognize them and what to do about them. One thing was always to drink LOTS of water (or Gatorade if you like the stuff). Another thing is that if you do suffer heat stroke, you’ll always be at increased risk afterwards.
Time for the driver to get out of the delivery truck and find a different job. Not easy at 58 but he could die next time.