The blaze, called the Harte Fire, was reported just before 2 p.m. near Camino Loop at Twain Harte.
Around 5:30 p.m., fire officials said the fire was 100 percent contained.
Dublin #HarteFire (Final) Update: The fire is 248 acres and 100% contained. Alameda County and @calfireSCU @CAL_FIRE firefighters will remain at the scene extinguishing hot spots throughout the evening. pic.twitter.com/Ht01ZDZOsC— Alameda County Fire (@AlamedaCoFire) August 10, 2019
CAL Fire and Alameda County Fire Department responded to the blaze. Fire officials said three dozers, 19 fire engines and four air tankers were being used to battle the fire.
This is AC Alert Alameda County. The Alameda County Fire Department reports a fast moving wildfire in the East Dublin Hills. Be prepared to evacuate. If you see smoke or feel in danger evacuate now. Evacuation routes are south on Collier Canyon or East on Highland.— Alameda County Office of Emergency Services (@AlamedaCoAlert) August 9, 2019
Fire officials said two structures were threatened by the fast-moving fire.
Earlier, residents were advised to be prepared to evacuate.
Alameda County Fire Battalion Chief Alan Evans said it's nothing short of remarkable that they achieved 100-percent containment within one hour and successfully protected nearby neighborhoods and cul-de-sacs that border the wild ranch land.
"The winds, fire season, the vegetation is all dry. Vegetation grew a lot higher and fires gain momentum and it's harder to stop fires once they get momentum," said Evans.
Nearby, homeowners watched in fear when they first saw the smoke, wondering if they would need to evacuate. Ten homes were evacuated as a precaution.
Homeowner Ronelle St. Luc said she saw the black smoke and the charred hillside where the hills were golden and felt extreme anxiety, then relief when it was under control.
Fire officials said crews with Alameda County and CAL Fire will remain at the scene to put out hot spots throughout the night.