Person experiencing chest pain at Mt Vernon Avenue Heard on: San Bernardino County Fire - Valley 00:08 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 23, (number withheld) Mount Vernon Avenue between Nerato Avenue and Mount Vernon Avenue (duplicate street name). 8/6/2026 10:40 AM Medical Emergency Mt Vernon Ave, Grand Terrace, CA 92313 View on map