I lived near a volunteer station in a New Jersey town where it is routine to use a siren (same as used for tornadoes in other parts of the country) to alert the volunteers to check in. It went off frequently every day.
I can't speak for the department near you, but in many departments, particularly towns/more rural areas, the fire department/fire station responds to both medical and fire calls. It very well may be the majority of responses were medical in nature. For example, 70% of NYFD call volume is medical [1].
Most fire department dispatches are for medical events (i.e., they're also doing paramedic work). On average, fire departments get about the same false-alarm fire dispatches and real-alarm dispatches.
I lived near a volunteer station in a New Jersey town where it is routine to use a siren (same as used for tornadoes in other parts of the country) to alert the volunteers to check in. It went off frequently every day.