It was so hot in Chicago on Saturday, June 30, that firefighters needed to hose down the Michigan Avenue Bridge to allow the bridge to open to let boats through because the steel in the bridge had expanded.

Twitter user @I_Said_Dat, who filmed this video, said firefighters needed to soak the bridge over the Chicago River for more than 30 minutes before it would open.

Temperatures were in the mid to upper 90s on Saturday with heat indexes well over 100 degrees, according to the National Weather Service. The city also tied a record for the highest minimum temperature of 80 degrees on June 30, which was set in 1931.

A heat wave was hitting much of the eastern part of the country on Saturday and through the weekend. The hot and humid weather was expected to continue on Sunday in Chicago with a chance of severe storms in the afternoon and evening. Credit: I_Said_Dat via Storyful