Mike,
Almost every Summer we have heat warnings telling older people to stay inside as much as they can. We have had a few heat related deaths over the years, but not that many. Most outside work, like roofers and such change their hours to work at night. But it doesn't last as long as it used to since the humidity has gone up. Not sure what to expect this Summer as they were moving in extra planes and such expecting a really bad fire season, but these late rains may have helped with that. I sure hope so as the past two years have been really bad.
Ron