Sorry for the bump,
It seems that there is a siren at the Oliver Volunteer Fire Department, according to this article: https://visitoliver.com/celebrating-100-years/
Apparently it sounds every Thursday evening. My friends who visited the town recently heard it go off.
Not sure exactly what manufacturer/model it is as I have been unable to see it on StreetView, but it sounded electromechanical in the video I saw it in. The video is not on YouTube, so unfortunately I cannot link it here. If anyone desperately wants to hear it, I will try to find a way to upload the video somewhere.
A British siren enthusiast. Previously lived at the furthest point from any sirens before co-discovering one very close to where he is located. Also features a great discomfort referring to themselves in third-person.