Excerpts from Fox32chicago.com:

A Chicago firefighter was not injured after falling through a floor battling a blaze Wednesday in Englewood on the South Side after crews were called to the scene of a fire about 9:35 p.m. in the 6900 block of South Green Street. He was quickly removed from the building by other firefighters and taken to the hospital as a precaution. He was listed in good condition. The fire was rapidly extinguished and no other injuries were reported.

From Chicago Fire Media @CFDMedia:

Green street mayday more. FF fell thru floor but does not appear to be injured. Rapid extraction by CFD members.

house fire scene in Chicago

CFD Media photo