Possible medical emergency near Willow Avenue in Atherton Heard on: San Mateo County Fire, CalFire CZU 00:39 00:00 San Mateo County Sheriff Dispatch. Start a code two ground ambulance for a possible ECH. 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 San Mateo County Sheriff Dispatch. Start a code two ground ambulance for a possible ECH. 00:06 Atherton. 00:18 Three 071 . 00:19 One 20 00:35 willow. 00:36 (number withheld) willow avenue, off of Chadbourne on patrol. 2026-09-29 04:07 UTC Medical Emergency Willow Ave, Millbrae, CA 94030 View on map