CASTAIC, California — A new wildfire that broke out north of Los Angeles on Wednesday rapidly spread to more than 9,400 acres (38 square km), fueled by strong winds and dry brush, forcing mandatory evacuation orders for more than 31,000 people. The Hughes fire about 50 miles (80 km) north of Los Angeles further taxed firefighters in the region who have managed to bring two major fires in the metropolitan area largely under control. In just a few hours on Wednesday the new fire grew to two-thirds the size of the Eaton Fire, one of the two monster conflagrations that have ravaged the Los Angeles area.

Officials warned people in the Castaic Lake area of Los Angeles County that they faced “immediate threat to life,” while much of Southern California remained under a red-flag warning for extreme fire risk due to strong, dry winds. Some 31,000 people were under mandatory evacuation orders and another 23,000 face evacuation warnings, Los Angeles County Sheriff Robert Luna told a press conference. The Angeles National Forest said its entire 700,000-acre (2,800-sq-km) park in the San Gabriel Mountains was closed to visitors.

As a result of the red-flag warning, some 1,100 firefighters were deployed around Southern California in anticipation of fast-moving fires, the California Department of Forestry and Fire Protection (Cal Fire) said. More than 4,000 firefighters were working on the Hughes Fire, Los Angeles County Fire Chief Anthony Marrone said. Southern California has gone wi.