Flames burst through the roof of a two-story factory Wednesday night in southeast Chicago, local media reports.
At about 8:40 p.m., fire broke out at Era Valdivia Contractors, a general contractor specializing in abrasive blasting, power washing and fireproofing. The roof collapsed, forcing arriving firefighters to organize a defensive attack from outside the building.
Officials escalated to a 3-11 alarm, bringing in extra equipment. Aerial devices delivered water from several different angles.
Although the fire was officially declared extinguished before 11 p.m., firefighters remained on the scene to prevent any hotspots from rekindling.
No injuries were reported. Cause of the fire remains under investigation.