Chicago firefighters say, when they arrived, heavy fire was coming from the second floor. When they went inside, the found the girl on a bed and brought her to safety.
One firefighter described his feelings on making such a rescue:
"I've got children of my own. Very excited, very nervous. Glad we were able to bring the child still breathing. She has a good prognosis," said the Chicago Fire Department's Greg Swanson.
Investigators say it appears the cause of the fire was electrical in nature.
The girl remained in critical condition Sunday night.