At ~7:41 AM, Westmorland 911 dispatched Station 20 (Murrysville VFC) for a Automatic Fire Alarm (AFA) at a home on Scenic Drive. Station 20 responded with Lieutenant 20 going directly the scene, and 3 firefighters (including Asst. Chief 20) responding to Station 20 to man Truck 20. Westmorland 911 dispatched the following stations to assist Station 20: Station 64 (White Valley VFD), Station 22 (Export VFC), and Station 78 (Sardis VFC). Lieutenant 20 was first on scene and found no fire or smoke. Lieutenant 20 determined that a smoke detector had gotten wet due to construction at the home, which activated the AFA System. All responding companies were cancelled by Lieutenant 20, and the home's AFA System was reset.