The 22nd Street Tunnel Disaster in Chicago, Illinois.On April 13th in 1931 a fire started inside a s

The 22nd Street Tunnel Disaster in Chicago, Illinois.On April 13th in 1931 a fire started inside a sewer under construction. “The fire started at approximately 6:30 PM when sewer workers using a candle to try to locate a leak in the tunnel accidentally ignited some sawdust.  The fire burned and spread for more than forty-five minutes before the fire department was alerted.  Truck 14, commanded by O’Neill, was the first apparatus on the scene, and, seeing only a thin curl of smoke rising out of the tunnel, the five firefighters descended into the tunnel via its only access point: an elevator. None of the firefighters were wearing masks or oxygen tanks and fifteen minutes after they descended into the tunnel, three of the firefighters emerged, suffering from intense smoke inhalation.  As O’Neill and another firefighter, along with several workers, were still in the tunnel, firefighters from Engine 23 entered the tunnel, but they, too, did not have masks or oxygen tanks and several of them were also overcome with smoke inhalation inside the tunnel.This scenario was repeated several times, as the limited access to the tunnel did not give fire officers an accurate understanding of the intensity of the fire, smoke, and gases inside the tunnel.  During the next two hours, more than fifty firefighters who had entered and exited the tunnel were suffering from smoke inhalation injuries.  While injured firefighters were rescued during these operations, some of the rescuers became trapped or injured themselves down in the tunnel. The fire department was soon informed by the construction company about the possibility that some of the missing firefighters and sewer workers could have sealed themselves inside an airtight compartment at one end of the tunnel.  In actuality, sixteen missing firefighters and sewer workers had sealed themselves inside the compartment, but their only means of escape was blocked by the fire, smoke, and gases.   Firefighters on the surface, however, continued to descend into the tunnel throughout the night, in an effort to reach their trapped colleagues.  Every firefighter was now equipped with masks and oxygen tanks, some loaned by suburban fire departments eager to contribute to the rescue efforts. Also during the night, a smoke ejector machine, designed by Chief Charles W. Ringer of the Minneapolis Fire Department, was delivered to Chicago from the manufacturer in Kenosha, Wisconsin.  The machine consisted of a massive fan mounted on a truck, with an intake tube that could be placed inside the tunnel.  The machine was put into operation at daylight, and it soon evacuated most of the smoke and toxic gases from the tunnel.  The sixteen firefighters and sewer workers sealed in the airtight compartment were soon able to escape, and, over the next few hours, firefighters were able to recover the bodies of the dead firefighters and sewer workers from the tunnel.”Summary source -- source link

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