The Marsh Complex Fire, a series of several vegetation fires east of Clayton, is now considered 85% contained, having burned about 655 acres on the northwest side of Mount Diablo in unincorporated Contra Costa County, firefighters said Sunday morning.
More than 400 firefighters were working Saturday are working to contain the three largest blazes in the Marsh Complex Fire in Contra Costa County.
No injuries have been reported and no structures are threatened by the fire, centered at Marsh Creek and Morgan Territory roads about four miles east of Clayton, Cal Fire officials said.
A shelter in place was issued earlier in the day near Clayton, with residents there advised to stay inside and close doors and windows. The advisory was lifted Saturday evening.
Due to smoke from the blazes, air district officials on Saturday morning issued an air quality advisory for the Bay Area through Sunday.
Crews first responded shortly after 3 a.m. to a fire near Marsh Creek Road and Bragdon Way, about a mile east of the Marsh Creek Road/Morgan Territory Road intersection in unincorporated Contra Costa County.
The cause of those overnight blazes is under investigation.
Authorities have closed Marsh Creek Road between Brentwood and Clayton.