At approximately 1600 hours, East Heights Engines 421, 431, and 441 along with Battalion 4, Riverwoods Int'l Squad 7 and Oakwood Snorkel 84 responded to a structure fire in East Heights in the 6700 block of North Gibbens. Upon the arrival of Engine 421, they found a 2-story vacant home 20 by 40, with heavy smoke from Sectors 1 and 2 on the second floor. Engine 421 secured their own water supply and lead out a preconnect. Engine 431 stretched a second line to the second floor. Squad 7 arrived and conducted the searches and assisted with overhaul. Snorkel 84 arrived and was sent to the roof. Engine 441 had the RIT assignment and set up ladders to the second floor should the companies need a rapid escape through a window. The fire was knocked in 10 minutes and companies were clearing the scene after approximately 90 minutes on scene. There were no injuries.