(dailynews.com) A brush fire burned about 100 acres in the Santa Clarita area Wednesday, but no structures were threatened, authorities said. About 200 Los Angeles County Fire Department firefighters battled the blaze, which was reported at Golden Valley Road near Sierra Highway early Wednesday afternoon.

The fire was upgraded to a third-alarm fire just before 1:25 p.m. Firefighters halted the blaze’s forward progress and reported it was 90 percent contained just after 3:15 p.m.

At least one of the county’s water-dropping helicopters was on the scene, as well as one of the Super Scooper aircrafts the county leases from Canada during fire season.

The fire was burning in hills just off Golden Valley Road near Golden Valley High School. Students could see the smoke rise from campus.

No evacuations were issued, but Golden Valley Road was closed between Robert C. Lee and Centre Pointe parkways, according to an official with the Santa Clarita Valley Sheriff’s Station.

The cause of the blaze has not been determined.