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A massive plume of smoke rises from a wildfire burning through rugged terrain and valleys under a clear blue sky.
Smoke rises from a wildfire burning near Marsh Creek Road and Morgan Territory Road in eastern Contra Costa County on July 17, 2026. The wildfire (Morgan Fire) burned 51 acres with no containment as of that afternoon, prompting authorities to advise residents on the east side of Mount Diablo to be prepared to evacuate. (Photo courtesy Cal Fire via Bay City News)

The Contra Costa Community Warning System gave the “All Clear” for the wildfire in Morgan Territory on the east side of Mount Diablo after firefighters announced Saturday morning that forward progress has officially stopped. 

According to Cal Fire, the containment on the 51-acre Morgan Fire reached 30% as of 9:19 a.m. Saturday (July 19). 

Although normal activities have resumed, firefighters encourage motorists and citizens to drive with caution and stay alert when passing through the area. Emergency personnel and crews are still actively working throughout the day, Cal Fire said.

Crews led by Contra Costa County Fire Protection District and Cal Fire began battling the blaze on Friday after it broke out in the area of Marsh Creek and Morgan Territory roads on the edge of the San Ramon Valley. 

The initial report Friday afternoon indicated the fire was 125 acres, but Cal Fire announced a couple of hours later that better mapping showed the size was closer to 50 acres. 

County officials issued an evacuation warning on Friday for residents between Morgan Territory State Park and Mount Diablo State Park (also known as zones CCC-249 and CCC-250), and fire crews had 0% containment as of Friday evening. 

The initial evacuation warning area for the Morgan Fire in July 2026. (Image courtesy Contra Costa County)

But conditions improved overnight during the cool summer eve, with firefighters fully stopping forward progress and making headway on containment by Saturday morning. 

For the latest fire information, visit the Cal Fire website or https://cwsalerts.com.

– Story by Bay City News Service, with DanvilleSanRamon editorial director Jeremy Walsh contributing.

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Jeremy Walsh is the associate publisher and editorial director of Embarcadero Media Foundation's East Bay Division, including the Pleasanton Weekly, LivermoreVine.com and DanvilleSanRamon.com. He joined...

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