The Orange County Fire Authority (OCFA) "Fire OC" frequency (151.010 MHz) is used when responding to wildfire calls. An analog VHF frequency, it allows for better propagation in canyon areas as well as easier interoperability with other agencies. Feed is typically quiet when no wildfire calls are active, so if your preferred listening app supports alerts based on a specific number of listeners, you can set this value lower to get notified more quickly.