Wind carried smoke from a vegetation fire in Northern California to the San Francisco Bay Area on Monday evening.

The fire, which broke out in the hills between Hopland and Ukiah, Calif., was first reported by the Mendocino County Sheriff's department just after 6 p.m. on Monday evening. An evacuation order was issued by the sheriff's department for Valley View Drive, the Bus McGall and Moose Road areas and the north end of Feliz Creek.

According to a Cal Fire tweet posted at 8:13 p.m., the blaze was 25 percent contained and had spread to 85 acres.

Scott McLean of Cal Fire said the agency has a "significant amount of resources" battling the fire. He said that the aircraft was being used to help contain the fire before sunset.

"It's in difficult terrain, so we're going to have a lot of hand crews involved, I was told earlier this evening," he said. "They're confident with 25 percent containment and 85 acres burned that we're definitely making some headway."

California State Sen. Mike McGuire tweeted that approximately 100 crewmembers were battling the fire.

The National Weather Service's Bay Area office reported at 7:18 p.m. that smoke from the fire had drifted into Sonoma County. One person commented on the NWS tweet about the smoke that they could see it northwest of Healdsburg. Another person said they were "seeing and smelling it" northeast of Santa Rosa.

Earlier on Monday, the Bay Area Air Quality Management District issued a Spare the Air alert for Tuesday with a forecast of ground-level ozone pollution in the unhealthy range.

"High levels of ozone pollution are harmful to breathe, especially for young children, seniors and those with respiratory and heart conditions," the district wrote in an email.

Drew Costley is an SFGATE editorial assistant. Email: [email protected] | Twitter: @drewcostley