At ~ 5:17 PM, Westmoreland 911 dispatched Station 20 (Murrysville VFC) to assist Station 30 (Delmont VFC) for an Automatic Fire Alarm (AFA) at the Delmont Public Library. Station 20 responded with 6 firefighters (including Chief 20 and Lieutenant 20) going to the station to crew Truck 20. Westmoreland 911 also dispatched the following additional stations to support Station 30: Station 64 (White Valley VFC), Station 22 (Export VFC), Station 63 (Claridge VFC), and Station 90 (Forbes Road VFC). Command 30 cancelled all responding units except for Station 30, as upon arrival and entry of the structure, it was found that the AFA System had been accidently activated. Truck 20 remained in service and station.