Apartment Building, Residential San Marino, CA – Sprinkler system activated for fire on fourth floor of apartment building February 12, 2026 viking210 On Thursday, Dec. 4, the San Marino Fire Department’s Battalion 9 assisted the Pasadena Fire Department on a mid-rise apartment house fire on the fourth floor. The fire was isolated to the primary apartment unit, and due to the activation of the building’s fire sprinkler system, damage was kept to a minimum. BC9 provided Command Support throughout the incident.