Firefighters on Saturday battled multiple brush fires in eastern Contra Costa County.
The so-called Marsh Complex included at least six fires burning on Marsh Creek and Morgan Territory roads, near Brentwood and south of Clayton, according to Cal Fire. The first fire was reported at 3:13 a.m.
Firefighters said the blaze has burned at least 655 acres on the north side of Marsh Creek Road. No injuries were reported and no structures have been damaged, according to Cal Fire.
Marsh Creek Road between Brentwood and Clayton, as well as Morgan Territory Road near Mount Diablo in unincorporated Contra Costa County reopened Saturday night, with the series of grass fires now 85% contained, Cal Fire said.
A shelter-in-place was issued in Clayton while firefighters worked to put out the fires. People in the area were advised to stay inside, close windows and doors.
Due to smoke from the blazes, air district officials on Saturday morning issued an air quality advisory for the Bay Area through Sunday.
The cause of the overnight blazes is under investigation.
Bay City News contributed to this report.
