had updated the incident burn area to 6,309 acres in size due to better mapping overnight. Containment grew from 20 percent to 77 percent as firefighters were being released from the incident, dropping the number of personnel from 1,300 to 575. The evacuation warning for the area of Highland Home Road as well as the San Jacinto Mountain communities of Poppet Flats and Silent Valley were also lifted Wednesday. Cooler temperatures and a lack of wind in the fire area assisted firefighters in gaining the upper hand on the incident. On Friday evening, four days after the fire broke out, the Manzanita fire was declared 100 percent contained at in size. Cause The fire was determined to have been caused by a traffic collision on Highway 79 in the Lamb Canyon Landfill area when a vehicle veered off the roadway and went down an embankment, igniting the brush. Two individuals from the vehicle, both a woman and a man, escaped with non-life-threatening injuries. See also 2017 California wildfires References 2017 California wildfires Wildfires in Riverside County, California June 2017 events in the United States