My cousin texted me and San Fran is 98! She said her dogs won't even go outside because the pavement burns their paws. It's been so many hot days in a row!
Good news is that it's supposed to cool down next week to the low 90s/80s Locals will be back to get their fix
I don't think the higher heat is worth the lower crowds personally. And from the CL, it looks like people feel the same way. I don't think most families with kids can ride that much when it's so hot and miserable.
If you are from AZ/NM and are used to large periods of 100 degree weather, that might be different....