Napa Red is now encrypted. This is the primary conventional dispatch channel for the PD and SO.
Considering the recent immediate fire evacuations of thousands of people in the middle of the night, with every available neighboring law agency (Yolo, Solano, Sac PD, Mendo, Colusa, Oak PD, Marin) resource pouring in by 3-4am, and those with the county's dispatch net pre-programmed had some efficient interoperability, will Napa have (or keep the current) ability to turn off E and interface with neighboring guests? And more importantly than the technical question, do they have and will they retain the training to do so? If I were a local, I'd be asking these questions at the next county supervisor's mtg and requesting action and a report back by Spring.
LE doesn't have anywhere near the same mutual aid planning/experience that fire does. There isn't an expectation that agencies will have each other's frequencies programmed, unless they're an immediate neighbor providing mutual aid on a regular basis. Also cops are typically not as radio-savvy as firefighters, so they may have another agency's frequencies buried somewhere in their template and not even know it.