Carbon monoxide alarm at Lake Forest home Heard on: Lake County Fire 00:31 00:00 Engine 421, two ACO alarm, no symptoms. 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 421, two ACO alarm, no symptoms. 00:04 Grid 13 at (number withheld) North Elm Tree Road, Lake Forest. 00:09 At (number withheld) North Elm Tree Road, Lake Forest. 00:13 Grid 13, ACO alarm, no symptoms. 00:16 Engine 421. 00:21 Lake Forest Engine 422. 00:22 Take that in place of 421. 00:27 Message received. 00:28 421, you can stay in quarters. 00:30 421, stay in quarters. 2026-11-12 00:38 UTC Fire Elm Tree Rd, Lake Forest, IL 60045 View on map