UPDATE: The Don Valley Parkway has reopened in both directions, according to the Toronto Star.

Visit GOTransit.com for the most recent route updates.

A major Toronto artery, the Don Valley Parkway, has been closed due to flooding after the nearby Don River spilled its banks following heavy rains.

Commuter chaos is expected Wednesday morning with the shutdown of the DVP in both directions from the Gardiner Expressway to Bloor St. Police closed the highway at about 5 a.m.

“The water is still rising and we expect this closure to last throughout the day,” Staff Sgt. Brian Bowman told CP24. “We just have to wait for the water to subside.”

The commuter train service GO has been affected as well with water submerging tracks on the Richmond Hill line.

Just before 8 a.m. ET, city staff said the water had levelled off. Rob Burlie, manager of road operations at Toronto Transportation Services, told 680News he expected the flooding to fully recede by 11 a.m.

Much of the Greater Toronto Area is under a heavy rainfall warning, CBC reports. There also reports of flooding on Highway 27 at Rexdale and on Jane Street near Wilson Avenue.

CityNews compiled time-lapse video of the DVP flooding.

It's not the first time the Don River has spilled its banks. On Aug. 19, 2005, the river spilled onto the DVP and numerous nearby roadways after 175 millimetres of rain fell in one afternoon, Stormchaser.ca reports. A crane and boats from the police marine unit were called in to help rescue people stranded by the flood waters.

PHOTOS OF THE FLOOD

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  • In this picture made available Friday, May 10, 2013, flashlights light the sky over a wind energy park during a thunderstorm near Jacobsdorf, eastern Germany, Thursday, May 9, 2013. (AP Photo/dpa, Patrick Pleul)

  • Horseback riders pass the burned area of the Santa Monica Mountains National Recreation Area in Newbury Park, Calif. on May 6, 2013, where some cactus survived the spring fire. Investigators ruled out arson as the cause of the fire that charred 44 square miles at the western end of the Santa Monica Mountains. (AP Photo/Tina Burch)

  • A ragpicker pedals a loaded cart as others help by pushing it on a road during a dust storm in Jammu, India, Saturday, May 11,2013. (AP Photo/Channi Anand)

  • A person waits to cross the street during a rain storm on May 8, 2013 in New York City. After experiencing an unusually dry spring in recent weeks, New York was hit with heavy rain Wednesday that resulted in numerous flash floods and heavy downpours. (Photo by Spencer Platt/Getty Images)

  • Cars dusted with volcanic ash sit parked in a casino parking lot in Puebla, Mexico, Tuesday night, May 7, 2013. The Popocatepetl volcano has spewed ash over several cities in the central Mexico state of Puebla, including the state capital. Mexico's National Disaster Prevention Center says there was an eight-hour period of eruptions at the volcano, located east of Mexico City. (AP Photo/Joel Merino)

  • A picture taken on May 7, 2013 shows a house in a flooded street in Bucheres, near Troyes, after the Seine river overflowed following heavy rainfalls. (FRANCOIS NASCIMBENI/AFP/Getty Images)

  • Smoke from a bushfire that is burning out of control at nearby Cherryville, hangs over the Adelaide Hills on May 10, 2013 in Adelaide, Australia. The out of control bushfire has burned 250 hectares (617 acres) of rugged terrain in the Adelaide Hills, claiming one house, and threatening more property. (Photo by Morne de Klerk/Getty Images)

  • A picture taken on May 9, 2013 shows a stormy sky above buildings in the city center of Nicosia, Cyprus. (PATRICK BAZ/AFP/Getty Images)

  • A man rides his bike through the street during a rain storm on May 8, 2013 in New York City. After experiencing an unusually dry spring in recent weeks, New York was hit with heavy rain Wednesday that resulted in numerous flash floods and heavy downpours. (Photo by Spencer Platt/Getty Images)

  • Smoke from a bushfire that is burning out of control at nearby Cherryville, hangs over the Adelaide Hills on May 10, 2013 in Adelaide, Australia. The out of control bushfire has burned 250 hectares (617 acres) of rugged terrain in the Adelaide Hills, claiming one house, and threatening more property. (Photo by Morne de Klerk/Getty Images)

  • Hikers walk along a fire road in the burned area of the Santa Monica Mountains National Recreation Area in Newbury Park, Calif., on May 6,2013. Investigators ruled out arson as the cause of the fire that charred 44 square miles at the western end of the Santa Monica Mountains. (AP Photo/Tina Burch)

  • Lightning strikes the sky over Kuwait City during a thunder storm early on May 5, 2013. (YASSER AL-ZAYYAT/AFP/Getty Images)

  • This picture shows water overflowing over the bank of the Seine River near Notre Dame cathedral on May 9, 2013 in Paris, following floods upstream caused by heavy rainfall. (PIERRE ANDRIEU/AFP/Getty Images)

  • Traffic moves through floodwaters at an underpass on May 8, 2013 in Jersey City, New Jersey. Heavy rains flooded streets, stranding some motorists during morning rush hour traffic. (Photo by John Moore/Getty Images)