Updated 2:27 p.m.: Fire crews responded with water-dropping helicopters and air tankers Tuesday afternoon in the attack on a 55-acre fire burning near the Six Flags Magic Mountain theme park in the Valencia area, according to NBCLA.
Aerial and ground units responded to the location near Magic Mountain Parkway and The Old Road at mid-day. The fire off the 5 Freeway was reported at about 11:30 a.m.
Containment was at 80 percent at 2:25 p.m.
Two air tankers were assigned to the brush fire, smoke from which could be see from Six Flags Magic Mountain theme park. The park is "unaffected" by the fire, according to a statement from Six Flags Magic Mountain.
No structures are threatened and authorities have not ordered evacuations. The nearby 5 Freeway remains open.
The fire comes amid hot, dry and windy conditions in Southern California. A fire north of Santa Barbara burned 1,800 acres by mid-day Tuesday and forced campground evacuations during Memorial Day.
Previously: The latest in a series of wildfires was sparked just before noon Tuesday north of Los Angeles near the Magic Mountain theme park and Interstate 5.
As of 1:55 p.m., the fire had burned 55 acres and was 25 percent contained.
Hundreds of L.A. County firefighters are responding with air support but there is no immediate threat to homes.
Up the coast in Santa Barbara County, firefighters are battling a 2.8-square-mile fire that erupted in Los Padres National Forest on Monday. Winds are expected to return there later in the day.