Person having difficulty breathing at Sierra Avenue unit Heard on: San Bernardino County Fire - Valley 00:13 00:00 Difficulty breathing. 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 Difficulty breathing. 00:01 Medic engine 71, medic squad 71, medic ambulance 648, (number withheld), Sierra Avenue, unit (number withheld), between Valencia Avenue and Orange Way. 2026-11-12 08:17 UTC Medical Emergency Sierra Ave, Fontana, CA 92335 View on map