Sorry you had a tough day, Vic. I enjoy those mountains much more when the weather is cooler, even cold, as cold as it gets there. I remember doing a lot of climbing then stopping at the Canyon Market (which burned down in the Woolsey fire) for a bowl of their great tri-tip chili before heading back to CSUN.

I've always done better than many others in the heat but it takes acclimation. When I was working outside I would acclimate just by working. Now I have to be more deliberate. The first heat wave can surprise us.

In 2020 when everything was closed, even parks had the water turned off, I did some solo rides (our club even closed) when it was hot. I'd start with a 70 oz Camelbak and 2 large bottles. I'd drain the Camelbak as soon as I could, then I had the bottles to get me to the next water.

forgot to add: The SM mountains are hot when the valley is hot. People think it will be cooler because it's close to the ocean. One time I drove to the beach on a hot day to climb Latigo with my ex wife. Nice at the beach, a few miles up Latigo it was 100 degrees. My wife turned bright red and we turned around.