Carbon monoxide alarm at Sierra Madre home Heard on: Los Angeles County CA Fire Dispatch 00:05 Engine 41, carbon monoxide alarm, (number withheld) East Sierra Madre Boulevard, Sierra Place, Mountain Trail Avenue, Red 1. 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. Engine 41, carbon monoxide alarm, (number withheld) East Sierra Madre Boulevard, Sierra Place, Mountain Trail Avenue, Red 1. 2026-11-05 16:00 UTC Fire E Sierra Madre Blvd, Sierra Madre, CA 91024 View on map