Carbon monoxide alarm at Hercules residence Heard on: Contra Costa County Fire Dispatch - East 00:07 00:00 Engine 73, respond to hazardous condition. 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 73, respond to hazardous condition. 00:02 (number withheld) Wadi Run, (number withheld) Wadi Run, crossing Terrace Court. 00:06 For a CO alarm. 2026-10-03 20:45 UTC Fire Wadi Run, Hercules, CA 94547 View on map