The cause of the fire, which has been burning for a day, remains under investigation and evacuation orders have been issued for Weed, Lake Shastina and Edgewood. “This incident is fast-moving and our staff and partners are doing everything they can to get everyone to safety,” the Siskiyou County Sheriff’s Office said. Officials in Siskiyou County are also battling the mountain fire, which had grown to 3,400 acres with 5 percent containment. “The fire continues to burn in timber. The fire was extremely active throughout the night. The fire is pushing north,” Cal Fire Siskiyou said. The cause of the fire on the mountain remains under investigation and evacuations have been ordered. Meanwhile, in Southern California, the Los Angeles County fire was 5,200 acres Saturday morning and 71 percent contained, according to an update from the Los Angeles County Fire Department. Firefighting operations continued overnight with a focus on mopping up hot spots and further building containment lines, the release said. “Today ground resources will focus on eliminating hot spots and further containment. Extreme heat, low humidity and steep terrain continue to be the biggest challenge for firefighters,” the fire service said.