0402 hours – Box Alarm – Whitney between Wildemere & Dexter, fire reported in a dwelling. Engines 34, 42, 39, Ladder 7, Squad 4, Chief 5. Engine 39 on scene stretching on a dwelling, request the next arriving company to prepare to dump their monitor (Engine 42). Chief 5 evacuated the dwelling due to heavy fire on the top floor front to back of a 2 story, brock, vacant dwelling. Chief 5 advised companies would be taking a defensive posture and were preparing to aerial operations from Ladder 7. While responding to this box, Engine 34 came across another dwelling going throughout on Northwestern Street at Dexter just a few blocks away. Engine 40 replaced them on the Whitney Street box.