Firefighters discovered the body in the doorway of the vacant building in the 1800 block of Pennsylvania Street in Gary as they were extinguishing the blaze a few minutes after midnight.
City officials are still waiting for all utilities to be cut off at the site, at 32 W. 8th St., before they move forward with an emergency demolition.
According to witnesses, a white BMW was traveling at a high rate of speed while turning west onto 87th Street from Indiana Avenue, when the driver lost control, and struck a home at 77 E. 87th St. about 5:15 a.m.
Denise Warfield, 47, was found just before 4:30 p.m. Saturday in a building in the 7200 block of South Ashland Avenue, authorities said.
Police found the body of decomposed man in an apparent drug den Saturday night on the Far South Side.
Firefighters battled a blaze Sunday afternoon at a South Side building thought to be vacant.