I spent many years of my life working in the hot sun in Central Texas in
the 70s and 80s until 84 as a framing carpenter. My body says the sun is
more intense now, and "feels" different as well. That's all I need for
confirmation.

Thank you Dave. Same here. I thought maybe it was just because I was
getting older, or because I've had to be out in the Sun more than I
use to, but no, it's anecdotes like that that convince me otherwise.
Would you say it was more like sunburning UV or more like maybe being
in a microwave oven? Not that you probably spend much time in a
microwave oven but as an interpretation of the "feel".