Grand Fire update: Air quality alert for LA County, 3,500 acres burned in Kern County

An aerial shot of the Grand Fire burning in Kern County.
An aerial shot of the Grand Fire burning in Kern County.
Courtesy NBCLA

Update 12:13 p.m.: Air quality warning for LA, road closures near Frazier Park

Air quality in Los Angeles has taken a hit from the fire burning in the Los Padres National Forest, the South Coast Air Quality Management District says. 

In their statement, the district says it's possible that areas in L.A. County could reach 'Unhealthy' levels today.  

Air quality may reach Unhealthy levels in areas of Los Angeles County most impacted by the smoke, including portions of the San Gabriel Mountains.  Other areas, including the Santa Clarita Valley area, may reach Unhealthy for Sensitive Groups levels or higher depending on fire and weather conditions.

The district says anyone who can see or smell smoke, and those in the county with respiratory problems, should close their windows and avoid strenuous indoor or outdoor activities. 

Cal Fire reports that several road closures are in effect near the fire, including all of Falcon Way near Frazier Mount High School an all roads entering Hungry Valley State Park and Piru Creek.

Update 7:17 a.m.: Fire, containment grow slightly 

Cooler temperatures and lighter winds are helping hundreds of firefighters combat a 3,500-acre wildfire that has blackened rugged terrain in the Los Padres National Forest.

As of 7 a.m. Thursday, the Grand Fire is 3,500 acres and 15 percent contained, according to Kern County Fire spokesman Corey Wilford.

The high school that was evacuated as a precaution Wednesday isn't threatened, but remains closed Thursday. Firefighters have their base camp at the school.

No structures or homes were threatened and no injuries or damage have been reported.

The fire near Interstate 5 through Frazier Park, where Kern and northern Los Angeles counties meet, could be fanned by winds that could reach up to 35 mph Thursday.

The fire has jumped southeast into Ventura County and about a half mile from the Los Angeles County line, Wilford said.

The cause of the fire is under investigation.

This story has been updated.