California Highway PatrolThe CHP added that Hall Ambulance took nine people to nearby hospitals, with injuries ranging from minor to major. PEOPLE has contacted the California Highway Patrol and the Kern County Fire Department for further comment, but didn't immediately receive a response. California Highway Patrol“CHP units responded to the scene of this mass-casualty/trauma incident, along with Kern County Fire and emergency medical services. The accident, which left one person dead and at least 20 injured, was likely caused by the "dense fog" in the area at the time. “Yesterday’s crash on Highway 99 is a heartbreaking reminder of how unsafe speed for conditions, combined with dense fog, can turn an early-morning drive into a life-changing event.”