0 0 Engine 22 on scene investigating heavy smoke in area. Fire found in a vacant 2 story dwelling – scene of multiple previous incidents. B-43 on scene with a working fire in a Do No Enter dwelling and defensive ops are ordered. Attack crews cover both exposures with big lines. Engine 3 requested to scene for water supply. Truck 15 vents roof on #4 side to allow fire to show itself. Truck 14 sets up on a vacant lot for Master Stream Ops. Extra 1&1 sent for manpower and water supply. Fire contained to original dwelling with minor exposure damages.B-56 orders Emergency Demo of dwelling. Stubborn hot spots due to roof collapse keeps Truck 14 on scene for multiple hours flowing3 -2½” & 2 -1¾” Line in useTruck 14 airborne and flowing. – Emergency Demo ordered.ON Scene:Engines: 22, 31, 28, 3, 38Trucks: 14, 15, 5, 10, Res1cueChiefs: B-43 & B-56Support Staff: F-20, 40, 9, 11Damages: $ 127K8/15/2021 – Time Out: 03:51 hrs