Thanks to the people on the FB group, I looked up the Zayante Calif. Fire Dept. siren. A refurbished 2T22:
https://youtu.be/8ONNw5GCUHA?si=0VYCS5NE4qKJdPsP
This area is in the mountains north of Santa Cruz. Wildfires & mud slides are their biggest threats.
The 2T22 show briefly at 1:43 in:
https://youtu.be/dtOVSJh6IjI?si=S12FRS-jy6QecKMo