A dry, smoky haze engulfed Berkeley on Friday afternoon as an eight-alarm fire in Solano County sent smoke miles southwest of its source in Suisin City.

Smoke complaints have been reported from Oakland to Contra Costa County, according to Berkeley Acting Deputy Fire Chief Avery Webb. An extra patrol unit was dispatched after a red flag warning was issued at 11:17 a.m. Friday morning for the areas of the East Bay Hills and Diablo Range above 1,000 feet.

As of late Friday afternoon, there are no fires in Berkeley, according to Webb.

Red flag warnings are issued when critical fire weather conditions either are occurring or will occur shortly, according to the National Weather Service. Combinations of strong winds, low relative humidity and warm temperatures can contribute to extreme fire behavior.

The red flag warning for the East Bay Hills and Diablo Range remains in effect until 6 a.m. Saturday.

Early Friday morning, a vegetation fire behind the Clark Kerr Campus was reported about 3:45 a.m. The fire grew to half an acre in size but was extinguished within an hour.

“We were concerned about (the fire) spreading or rekindling,” Webb said. “They were very thorough with extinguishing it, and checked on it multiple times after that.”