This from Steve Redick:

This was a 5-11 and 4 specials at 1400 W 32nd Place on May 25, 1966 in a large, vacant, wood-frame grain elevator. I have not seen very many color photos of this. My favorite shot is what looks like SS3’s Snorkel working. I would assume the fireboat would was Engine 41.
These amazing images were taken by Gerald Bean.
huge 1966 fire in Chicago

Gerald Bean photo

huge 1966 fire in Chicago

Gerald Bean photo

huge 1966 fire in Chicago

Gerald Bean photo

huge 1966 fire in Chicago

Gerald Bean photo

huge 1966 fire in Chicago

Gerald Bean photo

huge 1966 fire in Chicago

Gerald Bean photo

huge 1966 fire in Chicago

Gerald Bean photo