it's called a "siesta", kinda opposite of "fiesta". complete all outdoor activities by about 9:30am because the glare hurts my skin & eyes. sleep mid-day until 4pm-ish, work outside until & into dark. in the summer here night time temps rarely go below 18C and almost never the dew-point.
almost nothing thrives in full sun here unless it's roots penetrate 8-10' deep, where there is still some moisture to be had, and i've seen my prickly-pear cactus WILT. my mexican buddy's never seen/heard that one! and he's seen some cacti.
50% shadecloth seems to be the standard nursery practice out here.
Hottest temp here has been about 47C/115F but I also have a lot of reflection & glare, so my average temperature at my back door, due to paving & glare, mid-day can be about 130F/250ish?C.
Hottest I've measured around my home with my infrared thermometer was 180F on my car windshield/windscreen.
My native soil is too:
"Fine, mixed, thermic Abruptic Durixeralfs"
So when I see Gardener's World on BBC, I realize the colonies have a couple centuries to go, and England let's make a deal on rain for California, send it via Boaty.