This photo provided by Ryan Reede shows smoke from a fast-moving brush fire that Reede took as he was riding on a roller coaster at Six Flags in Valencia, north of Los Angeles. The brush fire erupted near the huge amusement and water park in Southern California on Sunday, sending hundreds of visitors to the exit to escape clouds of smoke and ash before fire officials asked them to stay put while they worked to contain the blaze. (Ryan Reede via AP)

This photo provided by Ryan Reede shows smoke from a fast-moving brush fire that Reede took as he was riding on a roller coaster at Six Flags in Valencia, north of Los Angeles. The brush fire erupted near the huge amusement and water park in Southern California on Sunday, sending hundreds of visitors to the exit to escape clouds of smoke and ash before fire officials asked them to stay put while they worked to contain the blaze. (Ryan Reede via AP)

In this Sunday, June 9, 2019, photo provided by Joel Cannon, heavy smoke from a fast-moving brush fire surrounds Six Flags Magic Mountain and Hurricane Harbor, in Santa Clarita, Calif. (Joel Cannon via AP)

Los Angeles County Fire helicopter drops water on brush fire burning close to Six Flags Magic Mountain and Hurricane Harbor amusement park in Santa Clarita, Calif., Sunday, June 9, 2019. Heavy smoke surrounding Six Flags Magic Mountain and Hurricane Harbor prompted the park to announce an evacuation shortly after noon Sunday north of Los Angeles. But about 40 minutes later, the park said on its Twitter account that fire officials asked guests to stay at the park while they work to contain the blaze. Police closed access roads to the park off Interstate 5. (AP Photo/Rick McClure)

Los Angeles County firemen fight a brush fire burning close to Six Flags Magic Mountain and Hurricane Harbor amusement park in Santa Clarita, Calif., Sunday, June 9, 2019. Heavy smoke surrounding Six Flags Magic Mountain and Hurricane Harbor prompted the park to announce an evacuation shortly after noon Sunday north of Los Angeles. But about 40 minutes later, the park said on its Twitter account that fire officials asked guests to stay at the park while they work to contain the blaze. Police closed access roads to the park off Interstate 5. (AP Photo/Rick McClure)

Los Angeles County firemen fight a brush fire burning close to Six Flags Magic Mountain and Hurricane Harbor amusement park in Santa Clarita, Calif., Sunday, June 9, 2019. Heavy smoke surrounding Six Flags Magic Mountain and Hurricane Harbor prompted the park to announce an evacuation shortly after noon Sunday north of Los Angeles. But about 40 minutes later, the park said on its Twitter account that fire officials asked guests to stay at the park while they work to contain the blaze. Police closed access roads to the park off Interstate 5. (AP Photo/Rick McClure)