This from Eric Haak:
These images were taken around 1950 by an aspiring photographer whose last name was Augustyn but I do not have a first name.The fire was on the Northeast corner of Diversey and Pulaski on the same lot as the Walgreens that is next to Engine 91’s house. The fire was in the Rainbo Lanes Bowling Alley. The truck closest to the building is Truck 35 and the one with its aerial up looks like Truck 13 although it is hard to read. The Water Tower is #2. Hope you enjoy them.