Chicago's City Hall was evacuated late Wednesday morning after a fire broke out in a mechanical room at the building, fire officials said.

Chicago City Hall and the County Building were evacuated Wednesday after a fire broke out in the records storage area. The contents of the fire were quickly extinguished and smoke conditions are being treated with fans and window ventilation,

Army Secretary Christine Wormuth -- in a dramatic and rare move -- on Tuesday fired one of the service's top generals following an Army inspector general investigation that concluded he improperly intervened in the process for selecting senior commanders.

A fire department spokesman confirmed the fire started in a records room on the 3rd floor of Cook County Building at 118 N. Clark St.