I live here. This particular heat is due to a stalled high pressure system as well as Santa Ana winds which blow in a westerly direction (come from inland). It is DRY. The heat is not bad but you will be thirsty constantly so plan to drink a LOT of water and never really feel satisfied.
I don't tolerate heat well at all nor does one of my two kids. We were at the parks over the past week when highs were upper 80s and I didn't even sweat. In the shade, it felt downright cool. I just took my kids to our community pool. It was 85 and I was sitting on a lounger in the shade and I was borderline chilly. Our current humidity is 26%.
Don't stress about the heat at all. It's very manageable due to the low angle of the sun since it's still technically winter, and the low humidity. Bring a lightweight jacket/hoodie for nighttime. It gets very cool.