This from Josh Boyajian:

The 14th Battalion on Chicago’s West Side received a report of a building on fire near the intersection of Pulaski and Ogden Avenues. Engine 38 and Truck 48 arrived first-in around 0544 hours and reported they did have a fire, and requested a Still & Box. Battalion 14 arrived on-scene and reported heavy fire in a two-story, 50×125 commercial building. At 0621 hours and 0623 hours, the 2-11 and 3-11 Alarms were requested. Six master streams and four hand lines were used in an effort to surround and drown the fire. At 0802 hours, 2-1-6 struck out the 3-11. As of 1130 hours, companies were being relieved on the scene as they continue to chase hot spots and overhaul the structure. The building was reported to have a music recording studio on the first floor and a banquet hall on the 2nd.
Here are some shots from the fire.
fire through the roof of a commercial building at dawn

Josh Boyajian photo

night fire scene in Chicago

Josh Boyajian photo

fire through the roof of a commercial building at dawn

Josh Boyajian photo

fire through the roof of a commercial building at dawn

Josh Boyajian photo

night fire scene in Chicago

Josh Boyajian photo