Cooking smoke triggers smoke detector on 21st St Heard on: Berkeley Fire 00:11 00:00 707 is free and up over here at 21st. 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. 00:00 707 is free and up over here at 21st. 00:02 This was a smoke detector 00:04 set off by cooking smoke, not a CO. 00:08 Homeowner notified, blew it out. 00:10 Everything's appeared normal. 2026-09-08 20:11 UTC Fire 21st St, Illinois View on map