I work in the spray foam construction industry around Dallas, TX. If I'm not working outside, I'm probably in an attic. The last few weeks have been absolutely miserable, I've really appreciated the frequent rains we've been having even though it shuts down roofing jobs. Over the last 10 days straight I've been on a roof job in Dallas proper, sun exposure has made me sick almost every single afternoon. Diarrhea, vomiting, headaches, dizzy spells have hit our whole crew repeatedly, only three out of 8 guys made it through the whole job without calling in sick. Water and pedialite are necessities, sometimes it's impossible to drink enough to keep up with how much we're sweating out.
Maybe it's due to just getting older (38 now) but it does seen the summer months are getting more and more brutal.