Person suffering chest pain at Sierra Vista Road Heard on: San Bernardino County Fire and EMS - South Desert Morongo Basin 00:09 00:00 Chest pain. 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 Chest pain. 00:01 Medic engine 10, medic ambulance 10A, (number withheld) Sierra Vista Road between McAllister Road and Hitching Post Lane. 9/10/2026 07:37 PM Medical Emergency Sierra Vista Rd, Phelan, CA 92371 View on map