Excerpts from WGNTV.com:

 An extra-alarm fire broke out near the filming of a television show on the city’s South Side. The fire started around 10:15 a.m. Thursday at a two-story home located at 4825 S. Kimbark Avenue.

The TV show ‘Chicago Med’ was filming two doors down and people in the area believed the fire to be part of the show. An off-duty firefighter, moonlighting as a medic for ‘Chicago Med,’ smelled the smoke and realized it was an actual fire.  He called it in, then ran over and helped the family evacuate the house.

One firefighter suffered minor injuries. No other injuries were reported.

thanks Dan