More than 1,000 firefighters are now battling the fire, which remains 30% contained after scorching 1,709 acres, officials said. The main goal for Friday was to increase containment of the blaze, which officials said was sparked by an illegal campfire.
"The efforts last night were to strengthen the 30% containment line that was established earlier in the afternoon and to protect the fire from jumping Highway 39," Los Angeles County Fire Department Inspector Keith Mora said. "Overall, we had much success with the weather giving us the opportunity to fight aggressively and make a stand."
In addition to holding containment overnight, crews had to contend with a flare-up around 1 a.m. near Highway 39, although it never breached containment lines, officials said.
The fire broke out along Glendora Mountain Road by the Colby truck trail and was initially fueled by strong Santa Ana winds. But officials said the winds have died down a bit, which has aided their firefighting efforts.
At a news conference Friday morning, officials asked the public to remember that conditions are still extremely dry and that fire danger remains high.
"The conditions are still extreme out there," said Angeles National Forest Supervisor Tom Contreras.