Webster University has canceled all evening classes due to a water main break at Big Bend Boulevard and Plymouth Avenue. The break caused a loss of water pressure at several buildings on the campus.

Susan Kerth, a spokesperson for the university, said the incident affected water pressure in all campus buildings except the East Academic Building, East and West Hall, Webster Village Apartments and the Garden Park Plaza Garage. 

The break created a huge hole in the westbound lane on Big Bend. Traffic is getting through on Big Bend, but only the eastbound lane is open. Crews with Missouri American Water are directing traffic.

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Tom Bommarito, a supervisor with Missouri American Water, said the 6-inch water main broke around noon, mostly likely because of old pipes. He said he expects it to be repaired and the road temporarily patched around 7 p.m.

Webster Groves High School is also near the water main break. However, Cathy Vespereny, a spokesperson for the Webster Groves School District, said the school was not impacted.

UPDATE: This story was updated at 3:45 p.m.