I remember one particular ENG in BKLYN in the early '60s that was in "reserve" on all the boxes in a very large area that was to be the site of a multi bldg housing complex that covered several square blocks & was comprised of all types of bldgs...during the slow process of vacating them & being demolished most burned ....(in those days all demo work in a bldg w/Fire damage resulted in premium pay for the demo workers.. so do that math)....from the third floor rear of the FH you could see & smell the smoke but they did not respond.