Other / Not Specified, Other Business San Carlos, CA – Sprinkler system prevented fire from spreading in commercial building September 7, 2018 viking210 San Mateo County Fire Department crews battled a 2-alarm fire at a commercial building in San Carlos early Tuesday morning, according to fire dispatch and reports. The blaze was first reported at 6:01 a.m. at 642 Quarry Road in San Carlos. Redwood City fire crews also responded to the scene and reported on Twitter that the building’s sprinkler system prevented the fire from spreading further. Crews said the cause of the fire was under investigation and additional information was not immediately available.