Mysterious Fire Engulfs Chicago Warehouse, Raising Concerns of Arson A massive fire has ravaged a warehouse in Chicago's industrial district, leaving investigators scrambling to determine its cause. The blaze, which broke out in the early hours of the morning, sent thick plumes of smoke into the air and forced authorities to evacuate surrounding buildings. As officials continue to probe the incident, many are speculating that the fire may have been intentionally set, sparking fears of arson in the city.