In California pretty much all summer has been a high risk of fire. Something like 24 major fires occurring currently. So if you want to go hiking at all you are taking on some risk.
If you want to go multi day backpacking you’re taking on some risk. But most hiking is very low risk. I just spent some time in Mammoth and there are dozens of day hikes that are low fire hazard (I’m looking at you, Convict Creek trail).