UPDATE 6:30 p.m. While fire officials have not yet called for a 100% knockdown of the Sky Fire, supervisor Flores said the fire is contained and will be monitored into the evening.

UPDATE 4:50 p.m. Nine people in proximity to the Sky Fire received medical attention due to smoke exposure, according to a tweet from the Los Angeles County Fire Department.

Supervisor Flores confirmed on-site medics helped anyone affected by smoke exposure and other fire-related health problems.

UPDATE 3:27 p.m. The Sky Fire is 20% contained, according to the LA County Fire Department PIO Twitter account. No structures are under threat.

Tactical patrol units are planned for fire watch into the evening, the tweet also read.

UPDATE 3:21 p.m. The California Highway Patrol cancelled their previous SigAlert and reopened the the off-ramp from the 5 Freeway onto Magic Mountain Parkway.

UPDATE 3:13 p.m. Six Flags Magic Mountain and Hurricane Harbor will remain closed on Sunday, according to a tweet. They are scheduled to reopen at the usual opening time of 10:30 a.m. on Monday.

The Sky Fire remains at 40 acres with all forward progress stopped, fire officials said.

UPDATE 2:15 p.m. In a tweet from Six Flags Magic Mountain, Los Angeles County Fire officials have reopened all exit roads from the park and park goers are allowed to leave.

UPDATE 1:55 p.m. The Sky Fire has grown to 40 acres, though all forward progress has stopped, according to supervisor Flores

Park goers who have not yet left will remain at the park, said Jeff Ziegler, LA County Fire specialist. The decision was made in a joint effort between LA County Fire officials and the Santa Clarita Valley Sheriff’s Department, he added.

All exit roads from Six Flags have also been closed, according to a tweet from the park.

UPDATE 1:25 p.m. The Sky Fire is now at 10 acres, according Supervisor Melanie Flores. Beyond the evacuations at the park, now nearby neighborhoods are under evacuation, she said. No other structures, including West Ranch High School, are threatened, she said.

The Magic Mountain Parkway off-ramp on the southbound side of the 5 Freeway was also closed as a way “to mitigate extra traffic,” said CHP officer Josh Greengard.

Park goer Darcy Hoek was at Hurricane Harbor when she and several other guests saw plumes of smoke rising into the air.

“We were inside Hurricane Harbor when it broke out,” she said from the parking lot, leaving the park with hundreds of other park visitors.

As she left the park, she saw a LA County Fire helicopter overhead, dropping water.

“The evacuation is a mess, there’s a lot of people just standing around,” she said. “The moment we needed to leave was when we started to see chunks of ashes falling around Hurricane Harbor.”

UPDATE 12:55 p.m. Due to the Sky Fire, Six Flags Magic Mountain and Hurricane Harbor are under evacuation, according to a tweet issued by the amusement park.

UPDATE 12:35 p.m. The incident, dubbed “Sky Fire,” has spread to 1 acre, according to Flores. Firefighters have set up a command post at the former El Torito parking lot on The Old Road, she said.

The southbound side of The Old Road was also shut down, according to California Highway Patrol officer Josh Greengard.

“We have it closed up to Rye Canyon Road by where Jimmy Dean’s is, diverting all traffic left onto Rye Canyon Road,” he said. “The northbound (side of The) Old Road is still somewhat open but they could have us close it in a little bit.”

ORIGINAL STORY: Los Angeles County firefighters responded to a brush fire along The Old Road and Skyview Lane in Santa Clarita on Sunday.

First responders were initially notified at noon and arrived within minutes, according to supervisor Melanie Flores of the Fire Department.

Information was not immediately available on the size of the brush fire or whether any structures were threatened.