SANTA CLARITA – Scores of Los Angeles County firefighters fought a fast-moving brush fire Saturday south of Gorman. Fanned by winds up to 40 mph, the blaze scorched more than 2,000 acres within four hours as it quickly spread over the rugged, unpopulated terrain. “Fire has been burning in inaccessible areas; we’re using helicopters to get into (there),” said Mike Brown, a spokesman for the Los Angeles County Fire Department. “Hand crews are fighting from the ground.” Flames were spotted just before 2 p.m. on the southbound side of the Golden State Freeway, north of state Route 138, but winds quickly spread the blaze. The freeway was not closed and traffic was moving normally, he said. Hand crews who hiked into the remote area planned to work through the night, hoping to cut a containment line around the flames. Authorities said the cause of the blaze is unknown but an investigation is under way. [email protected] (661) 257-5255 160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! Late Saturday, crews were still struggling to contain the fire near the unincorporated community of Gorman in northwestern Los Angeles County about 30 miles north of Santa Clarita. No structures were immediately threatened, but officials warned that if the wind changed direction, homes south of Quail Lake Road in Hungry Valley could be in danger. Record low rainfall has left the region parched and created critical fire conditions. On Friday, Caltrans announced plans to expedite brush-clearing projects on its land in areas of high fire danger. At least 30 county engines, eight hand crews and three water-dropping helicopters responded to Saturday’s fire. The city of Los Angeles also deployed a helicopter. The flames scorched acreage in the Angeles and Los Padres national forests, where a fire warning was issued earlier this week. U.S. Forest Service strike crews from both areas responded, Brown said.