Costa Mesa and county emergency crews responded Friday afternoon to "lots of smoke and lots of fire" at Talbert Nature Preserve, said Costa Mesa Fire Battalion Chief Kevin Diamond.
Crews arrived about 1 p.m. to a brush fire that affected about a quarter-acre of the southern section of the county park.
The fire was put out in about 30 minutes, Diamond said.
Three engines and one truck responded to the area of the park where 19th Street meets Balboa Boulevard.
As of 2:30 p.m. Friday, crews were working to clear brush around the area affected by the blaze as a standard safety procedure, Diamond said.