There are several possible warning signals including: Nixle, Soco Alerts, WEA, and the OCVFD siren
Our experience of the Kincade fire evacuation was that we first learned about this from our neighborhood groups (by phone or text), then on Next Door, then on local radio station KSRO (1350AM, 103.5FM/93.5FM), and then Nixle,
Here’s how to sign up for NIXLE and SoCoALERT
NOAA All Hazards Weather Radio General Information
During the Kincade fire evacuation, the Occidental Volunteer Fire Department siren was turned on for 5 minutes, as an evacuation alert. (In addition, several hours later, Sheriff’s Department vehicles circulated throughout Occidental, cycling their sirens.)