The fast-moving fires, fueled by high winds and low humidity, increased quickly since Monday, damaging at least eight homes and threatening thousands of others.
Fires threatening more than 20,000 structures
The update said that seven structures were damaged, and one was destroyed in the blaze, which is also threatening more than 20,000 other structures.
Extreme fire weather in the area, including high winds between 30 to 50 mph pushed the flames into Chino Hills, northeast of Yorba Linda, on Tuesday.
Winds are forecast to weaken overnight to between 20 and 25 mph, and firefighters are hoping to use that time to build containment lines around the fire, Cal Fire said in the update.
About 20 miles south, the Silverado Fire has burned 13,354 acres near Irvine since early Monday morning, a Cal Fire incident update said late Tuesday night. The cause of the fire is under investigation and is 5% contained.
No structures have been lost or damaged, according to Cal Fire, and more than 1,200 fire personnel are working on the blaze.
While some evacuation orders have been lifted for parts of Irvine, approximately 70,000 residents are still under evacuation orders, Orange County Fire Authority PIO Captain Jason Fairchild told CNN.
Mandatory evacuation orders remain in the areas of Yorba Linda, Chino Hills, the Sleepy Hollow area of Brea, Olinda Ranch, and Brea Hills, according to Cal Fire.
Nearly 30,000 residents from Yorba Linda and Chino Hills were evacuated as of Tuesday morning, according to the Chino Valley Fire Department.
Gov. Gavin Newsom announced the state has secured federal funds to support response to the Blue Ridge Fire and Silverado Fire.
Animals evacuated from the Silverado Fire
As the fires grew, many animals were rescued from the area.
This is the second time animals have had to be relocated because of wildfires. The last time was in October 2017.
Zoos typically have contingency plans in case of emergency and the OC Zoo keeps extra kennels and supplies on hand for just this type of incident. The zoo staff will transfer as well to care for the relocated animals. The animals are not on display.
CNN’s Stella Chan, Sarah Moon, and Cheri Mossburg contributed to this report.