The Mines Fire burning in Santa Clara County which has scorched 283 acres is at 25% containment, Cal Fire said Monday evening.

The fire, which was first reported just after 2 p.m. On Sunday, has now burned 283 acres as of Monday at 5 p.m. After better mapping was used to bring the acreage up from 172 acres previously reported.

On Sunday night, Cal Fire said crews had halted the fire’s progression, and it had been holding at 40% containment through Monday morning. But by Monday afternoon, authorities said containment had shrank to 25%.

However, Cal Fire said it believes it has a good handle on the fire.

“Air resources have made significant work in implementing retardant lines in conjunction with dozer containment lines,” said a spokesperson for Cal Fire on Monday evening. “Firefighters are also working hard to secure containment lines and continue mopping up. Additional resources are enroute to support current resources for dayshift tomorrow.”

The fire is centralized near Mines and San Antonio Valley roads in the San Antone Valley.

The cause of the fire is still under investigation.

Katy St. Clair got her start in journalism by working in the classifieds department at the East Bay Express during the height of alt weeklies, then sweet talked her way into becoming staff writer, submissions editor, and music editor. She has been a columnist in the East Bay Express, SF Weekly, and the San Francisco Examiner. Starting in 2015, she begrudgingly scaled the inverted pyramid at dailies such as the Vallejo Times-Herald, The Vacaville Reporter, and the Daily Republic. She has her own independent news site and blog that covers the delightfully dysfunctional town of Vallejo, California, where she also collaborates with the investigative team at Open Vallejo. A passionate advocate for people with developmental disabilities, she serves on both the Board of the Arc of Solano and the Arc of California. She lives in Vallejo.