160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! AD Quality Auto 360p 720p 1080p Top articles1/5READ MOREGame Center: Chargers at Kansas City Chiefs, Sunday, 10 a.m.The U.S. Forest Service announced it was closing the Cleveland National Forest, just east of the burn area, until the wildfires ringing it were brought under control. About 600 firefighters from around the region were assigned to the Santiago blaze. Four helicopters and four airtankers are expected back on the job shortly after sunrise. Damage from the fire was estimated at $10 million. Anyone with more information as to the cause of the fire was asked to call the arson tip line at (800) 540-8282. IRVINE – The nearly 20,000-acre arson fire that has destroyed about a dozen homes in Orange County horse country east of Irvine was about 30 percent contained today, as the offshore winds that have fanned the flames started to let up. One of the most active fronts on the so-called Santiago Fire — Orange County Fire Authority Chief Chip Prather said it was started near Santiago Canyon and Silverado Canyon roads about 5:55 p.m. Sunday, and three points of origin were identified — was burning in the in the area of Modjeska and Silverado canyons. Though the Santa Ana winds were starting to let up, forecasters predicted another day of temperatures in the 90s coupled with dry conditions. Evacuations remained in place for virtually every community east of Irvine. Evacuees were being sheltered at El Toro High School in Lake Forest and at El Modena High School in Orange.