NEWHALL – A brush fire erupted Friday in the Newhall Pass, but 200 firefighters and nine helicopters were en route before it could rage out of control. Under a red flag warning signifying a high fire danger, fire officials jumped on the blaze, holding it to 40 acres, said German Aguilar, spokesman for the Los Angeles County Fire Department. “We fight all our brush fires aggressively, especially in conditions like these,” Aguilar said. “We don’t want to be out there for two weeks.” The fear was that conditions were prime for a major fire – hot, dry air and rugged terrain that’s tough to access, he said. 160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! AD Quality Auto 360p 720p 1080p Top articles1/5READ MOREThe joys and headaches of holiday travel: John PhillipsThere were no injuries or damage, but the fire did prompt the closure of The Old Road, an alternate route to Interstate 5. Spectators also caused a miles-long traffic jam on the freeway. Flames broke out shortly before 1 p.m. in Weldon Canyon, near the junction of I-5 and the Antelope Valley Freeway. The fire moved uphill east of I-5, and was still burning four hours later, although firefighters were gaining control. Aguilar said a cause had yet to be determined.