WEST MIFFLIN, Pa. -- Pennsylvania American Water experienced a fourth water main break in 31st Ward/West Mifflin area on Monday.

It’s the third break in one day.

The 30-inch main break, which is located on Interboro Ave. at Oakleaf Dr., may result in a loss of pressure and or water service to customers in the area.

Pennsylvania American Water said crews will work around the clock to make necessary repairs.

The company is asking customers in the affected communities of Munhall, West Mifflin, Homestead, West Homestead and the 31st Ward to voluntarily reduce water usage while the main repairs are made.

West Mifflin and Steel Valley School Districts will remain closed on Tuesday due to the breaks.