Esopus still uses its siren and it goes off for all calls at any time of day, and sounds off at Noon everyday plus a test that is done on Wednesday evening around 7PM usually.
It is actually kind of nice to have, because if I am outside doing something and don't have my pager or in many cases I barley get enough single for the pager, so listening for the siren is a quick way for me to know for sure if something is going on.