SAN DIEGO — A brush fire in East County prompted an evacuation warning late Monday afternoon, authorities said.

The fire, which started around 11:45 a.m. near State Route 78 and Ramona Trails Drive in the Witch Creek area, just east of Ramona, posed an “immediate structure threat” on Rancho Santa Fe Court, Cal Fire San Diego said in a tweet.

The forward rate of spread has been stopped as of 1:30 p.m., Cal fire said.

The blaze grew to 50 acres as of 1:00 p.m. with a moderate rate of spread, jumping from a reported 10 acres at 12 p.m., according to Cal Fire.

A temporary evacuation point has been set up at Olive Peirce Middle School located at 1521 Hanson Lane in Ramona, according to Cal Fire.

Residents who live north of state Route 78, east of Pamo Road, west of Caesar Drive, and south of Burma Road were briefly encouraged to evacuate Monday afternoon as crews battled the Caesar Fire, according to San Diego County.

SR-78 is closed in both directions from Magnolia Avenue to Sutherland Dam Road as crews works to extinguish the blaze, Caltrans San Diego said in a tweet.

Evacuated residents with large animals can take them to Ramona Rodeo Grounds located at 421 Aqua Lane, San Diego County Sheriff’s Department said.