Luckily, we're not as humid as places like Austin or Dallas both which are suffering with 100 degrees and regularly have 70-80% humidity. As I remember, when you walk outside it's like someone threw a warm wool blanket on top of you.
And, we're not as hot as places in the real desert that get up to 110-115 or so.
But still, wow. These are the days I wish I lived in Portland (highs of 85-90) or Santa Cruz (high of 75, oh the humanity!)
Incidentally if one is in Grass Valley, CA, one could go visit the Empire Gold Mine, a state park consisting of an old gold mine and the houses lived in by the owners (in 1900s). There's a small "living history style" tour of the house, and many informational displays about the mine, mining, and the miners' lives. I filled my head with many story tidbits about mining, life in 1905, and the Cornish miners. Cornish miners ... hmmm ... that just sounds rich with story.