In Sylmar, a suburban neighborhood in the San Fernando Valley, the Hurst Fire had grown to 855 acres by Thursday morning, forcing emergency evacuations in some areas. The fire was 10% contained as of Thursday morning, Cal Fire said. The Lidia Fire near Acton in Los Angeles County, sparked Wednesday afternoon.

The expanding wildfires in Southern California have prompted more evacuation orders overnight while the Los Angeles County Public Health Department declared a local health emergency, stating the developments are causing “significant health and safety risks for residents across the county.