In 1977 (a long, long time ago) my wife and five kids and I spent a month in our RV touring the West. On our way to San Diego we intended to camp at Picture Rocks Park, West of Gila Bend. We got there and it was clean with lots of ramadas, nice scenery, and of course the very interesting petroglyphs, but we were absolutely alone. Not another soul anywhere. That seemed strange. Then I opened the door and quickly figured out why. It was like sticking my head in an oven. We looked around, and left for Yuma.
And today, where was I surveying? At the huge solar project on Picture Rocks Road, and it was again warmish. Not as bad as last time, but warm enough. Those are huge glass mirrors that rotate to focus the sun on the boiler tubes.

Very cool