That fire happened Sunday morning in the 4700-block of North Kewanee Avenue in the city's Mayfair neighborhood.
The Cook County Medical Examiner's Office said 52-year-old Jennifer Klebba died Monday.
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Two cats were also rescued from that fire and given oxygen.
Klebba's 80-year-old aunt and her 56-year-old brother were injured and are still in the hospital recovering, a family friend said.
Klebba's friend said she was the caretaker for those two relatives and was a fun person, who loved art, music and theater.
Officials did not immediately provide any additional information about how the fire started.