Los Angeles County firefighters are battling a 1,000-acre wildfire near Castaic Lake north of Santa Clarita, according to the Los Angeles County Fire Department air operations team.
The blaze is moving at a moderate rate of speed and a second alarm assignment has been requested, county fire officials said.
"With the grass being as tall as it is right now those are light flashing fuels and it gets moving relatively quickly," said Inspector Richard Licon. "The fire started out at 1:57 p.m. this afternoon and by 3 p.m. it was already 200 acres and moving pretty quickly."
Three helicopters and one strike team are on the scene in addition to firefighters, according to a Department tweet.
The fire was first reported to be 150 acres and moved into Angeles National Forest jurisdiction around 3 p.m., according to fire volunteers on the scene.
The blaze is currently ten percent contained and no homes are threatened, fire officials added.
Two outbuildings have been destroyed by the fire.