If you have a full time fire department, it makes sense to have them working with EMS rather than just waiting for a fire. If you have a volunteer fire departm

If you have a full time fire department, it makes sense to have them working with EMS rather than just waiting for a fire. If you have a volunteer fire department or part-time fire department, you will call them out only for fires. I would expect in smaller towns that fire departments would not be regularly doing EMS legwork but would focus on fires. But I have no idea if this hypothesis is relevant to your situation. It could also be that the same station has a fire truck and ambulance, and the fireman jump into the ambulance for an EMS call and only use the firetruck for fires.