Chicago city workers hosed down the Michigan Avenue bridge on Saturday due to the extremely high temperatures
The city of Chicago has several "movable bridges" made of steel that raise up and let boats pass through.
However, officials said in the extreme heat, the steel expands making the bridge inoperable and unable to raise up or close.
Workers had to use a special vessel to propel the water onto the steel beams of the bridge.
The National Weather Service extended the "excessive heat warning" for the entire Chicago area, including Northwest Indiana.