Grand Fire Burning Near Tres Hermanos Ranch in Chino Hills

Breaking out about an hour ago, the Grand Fire, consuming about 20 acres, is burning on both sides of Grand Avenue, west of Grand Avenue Park and in the vicinity of Tres Hermanos Ranch.  Mapping looks to show the fire mostly on the north side of the thoroughfare and heading northeast through some hills towards some Chino Hills residences accessed from Chino Hills Parkway north of Grand.

Some of the flames look to have been on the south side of Grand, but whether the spread is of any significant there, as opposed to the other side of the road, is not clear.  Incident command stated about 40 minutes ago that "the fire poses an imminent threat to structures and has a potential for 100 to 200 acres."  We'll provide updates as they are released.

UPDATE, 8:37 P.M.  The Grand Fire is now about 30 acres and, some 25 minutes or so ago, Level 3 evacuation orders were issued for 4 streets west of Chino Hills Parkway, north of Grand Avenue.  Chino Hills Parkway is closed at Falling Star and Country Walk lanes.  An evacuation center is in place at the Chino Hills Community Center, 14250 Peyton Drive.

UPDATE, 9:10 P.M.  Another 9 streets in the affected area are under a Level 2 evacuation within the last 20 or so minutes, while acreage remains about 30 acres.  A helitanker did water drops, but it and the other copters were released.

UPDATE, 10:20 P.M.  According to Chino Hills council member Peter Rogers, the Grand Fire was caused by a Tesla that overturned on Grand Avenue.  No further information to report on the blaze.

UPDATE, 10:22 P.M.  Spoke too soon!  Here is a just received notification from the City of Chino Hills:

GRAND FIRE UPDATE - EVACUATION ORDERS LIFTED As of Wednesday, May 13 at 10:00 pm, all EVACUATION ORDERS related to the Grand Fire have been lifted. The road closures at Chino Hills Parkway and Falling Star Lane, and Chino Hills Parkway and Country Walk are being reopened. Grand Avenue is closed from Grand Avenue Park to the City limit, and is expected to remain closed overnight. The fire is holding at approximately 30 acres with 0% containment. Crews are making good progress, with decreased fire activity due to cooler temperatures and increased humidity. Firefighters will continue operations through the night. The Emergency Evacuation Center located at the Chino Hills Community Center (14250 Peyton Drive) will remain open as needed to support displaced residents as they re-enter.  Thank you to the coordinated efforts from our first responders from Chino Valley Fire District, Chino Hills Police Department, City staff, and all partner agencies from outside of the area that supported the effort and a quick response. Thank you to our community for your patience and cooperation. This is the final update unless conditions change requiring further emergency action.