Around 200 firefighters have been battling flames in sub-zero temperatures after Chicago's largest fire in years.
The five-storey warehouse was transformed into a winter palace as water from fire hoses extinguished the fire and started forming icicles on the outside of the building.
Freezing temperatures made the firefighters' job tougher, as they struggled with icy ladders and freezing water turning their gloves and clothing solid.
The fire broke out late on Tuesday night and its cause is still being investigated.
Deputy Fire Commissioner John McNicholas said much of the warehouse has collapsed onto itself and that there was a risk of parts of the building falling onto surrounding roads.
The Chicago Fire Commissioner told the Chicago Tribune: "This was a very large fire, unbelievable fire load, a lot of wood, timber, old stuff, varnish. Once it caught, it caught and ran."
Temperatures reached -20 degrees Celsius on Tuesday night, with Arctic conditions being recorded across many parts of America.