The water main break caused the water pressure in the area to drop. Cooling towers in several downtown buildings are not working properly and can't keep the buildings cool.
The city of St. Louis Water Division is working to restore water pressure in the buildings and adjusting pressure in other parts of the city to compensate for the main break.
Several residents on Washington Avenue said their buildings lost air conditioning since they lost water. The St. Patrick's Center also had to shut down Friday.
St. Louis City Water Commissioner Curtis B. Skouby said water pressure was restored to the majority of the area by noon, but crews were still working along Washington Avenue between 13th and Tucker streets. Skouby said crews hope to have water restored there by Saturday.