Carbon monoxide alarm near Diamond Street Heard on: Philadelphia PA Fire Dispatch Group Calls 00:24 00:00 Engine 27, (number withheld) Diamond Street, the alarm system. Transcript This transcript is auto-generated from live dispatch audio and may be incomplete or inaccurate. It is not an official report and may change. 00:00 Engine 27, (number withheld) Diamond Street, the alarm system. 00:02 Engine 27, (number withheld) Diamond Street, the alarm system operates off CO alarm. 00:09 Engine 27. 00:11 Engine 27. 00:14 (number withheld). 00:17 Engine 27. 00:19 Engine 27. 00:22 Alarm location, nothing showing. 2026-09-13 23:48 UTC Fire W Diamond St, Philadelphia, PA 19121 View on map