2126 hours – Box Alarm – Chamberlain & Elsmere – Fire reported in a dwelling, Central has no address, unknown if occupied. Engines 33, 29, 27, Ladder 13, Squad 4, Chief 7. Engine 29 reporting smoke showing enroute, Ladder 13 on scene assuming command, requesting 2nd arriving engine company to dump their monitor. Engine 33 stretched and Engine 29 dumped the monitor. Chief 7 arrived, assumed incident command and requested another company for RIT (Engine 34). Chief 7 reported fire in a 2 story dwelling, holding all companies. 2 lines stretched, fire on the first and second floors, exposing on the B side occupied dwelling. Fire under control in about 45 minutes.