After talking with the FD last week, they seem to think that they will not be sounding the sirens for the start of halloween trick or treating.
Since the 3 city omni-directional sirens are controlled by the 911 center, I guess the PD sounded them off anyway,
Video is dark, I guess my camera doesn't like dusk.
http://www.youtube.com/watch?v=uzXQMF2c_KQ