Person requires medical assistance at Alta Vista Ave Heard on: Marin County - All County Fire Agencies 00:09 00:00 Engine six, medic ten, medical, (number withheld) Alta Vista Avenue, unit A Alpha, 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 six, medic ten, medical, (number withheld) Alta Vista Avenue, unit A Alpha, 00:05 1900 . 2026-09-13 18:59 UTC Medical Emergency Alta Vista Ave, Mill Valley, CA 94941 View on map