UPDATE: 2:13 p.m. - The City of Calgary says Deerfoot Trail has re-opened to all traffic in both directions.

Deerfoot Trail has been closed in both directions, after a train derailment on the Bonnybrook Bridge in Calgary early this morning.

Deerfoot is closed to traffic between Glenmore Trail and the Calf Robe Bridge in both directions “until further notice,” according to police.

The weight of the train's rail cars are causing the bridge to fail, and six cars are threatening to fall into the river.

Calgary's acting fire chief says emergency crews are working to secure the cars that are on a bridge that is slowly sinking into the Bow River.

Ken Uzelok says crews are stringing a cable through the railcars and securing it to bulldozers on land so that, if the bridge gives way, the cars won't be carried down the river.

Glenmore, McLeod, Blackfood Trails, among other side streets, are being reported as gridlock conditions as many drivers try to make their way to downtown.

The following road closures are in place and will be in place for the next several hours, say police:

  • Deerfoot Trail northbound at Glenmore
  • Deerfoot Trail southbound at 17 Avenue
  • Ogden Road at 17 Street
  • Ogden Road at 50 Avenue
  • Peigan at Barlow
  • Barlow Trail at 61 Ave.
  • Highfield Crescent at 13 Street SE
  • Ogden Road at Millican Road

Mayor Naheed Nenshi has asked that Calgarians, particularly those living in the southeast, stay off the roads and work from home if possible.

Also on HuffPost:

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  • Crews work at the scene of a rail bridge collapse and railcars derailment over the Bow River, southeast of downtown Calgary, Alberta on Thursday, June 27, 2013.

  • Crews work at the scene of a rail bridge collapse and railcars derailment over the Bow River, southeast of downtown Calgary, Alberta on Thursday, June 27, 2013.

  • Crews work at the scene of a rail bridge collapse and railcars derailment over the Bow River, southeast of downtown Calgary, Alberta on Thursday, June 27, 2013.

  • Crews work at the scene of a rail bridge collapse and railcars derailment (centre, bottom) over the Bow River, southeast of downtown Calgary, Alberta on Thursday, June 27, 2013.

  • A close-up photo of the derailment.

  • A inspector examines a Canadian Pacific freight train as it sits derailed on a failing bridge over the Bow River in Calgary, Alta., Thursday, June 27, 2013. THE CANADIAN PRESS/Jeff McIntosh

  • A close-up screen grab of the derailment

  • A close-up screen grab of the derailment

  • A inspector examines a Canadian Pacific freight train as it sits derailed on a failing bridge over the Bow River in Calgary, Alta., Thursday, June 27, 2013. THE CANADIAN PRESS/Jeff McIntosh

  • A inspector examines a Canadian Pacific freight train as it sits derailed on a failing bridge over the Bow River in Calgary, Alta., Thursday, June 27, 2013.

  • MORE FLOOD PHOTOS FROM AROUND SOUTHERN ALBERTA

  • RCMP at the road block on the highway outside of Canmore, Alta.

  • Streets remain submerged in High River, Alta.

  • High levels of water continue to make conditions dangerous in High River.

  • Dark and murky water hides many hazards on the streets of High River, Alta.

  • Pet alley at Blackie for residents to sleep with pets.

  • Canmore, Alberta on Saturday June 22.

  • RCMP and numerous truckers rescued by helicopter as flood waters washed out the Hwy 1 near Canmore, Alberta.

  • Hugs for displaced people at the Blackie Evacuation Centre.

  • Flooded streets in southern Alberta community.

  • Emergency workers in High River, Alberta.

  • Road Block in High River, Alberta

  • Houses in some areas of High River, Alta. are still severely flooded.

  • Roadways unsafe as flood waters scatter debris and damage streets in High River, Alberta.

  • RCMP Helicopter at High River, Alberta.

  • Advising drivers in High River, Alberta

  • Flooded streets in High River, Alberta

  • Damaged roads in High River, Alberta

  • RCMP in High River, Alberta

  • More photos of the Alberta flood

  • Monica West carries damaged goods out of a souvenir shop as clean-up crews work at the Calgary Zoo in Calgary, Alberta, Canada on Tuesday, June 25, 2013. Heavy rains caused flooding, closed roads, and forced evacuations across Southern Alberta. Calgary Zoo staff risked their lives over the weekend to stop a hippo from escaping into the swollen Bow River. Director of animal care, conservation and research, Jake Veasey, says flood waters in the hippos' enclosure rose high enough during the floods for the dangerous herbivores to swim out. One hippo named Lobi was feeling particularly adventurous and was moving freely around the African Savannah building. Veasey had to break a window to get into the building and he swam in the muddy flood waters to find the animal. Zoo staff used cinder blocks and construction equipment to block Lobi inside the building. (AP Photo/The Canadian Press, Jeff McIntosh)

  • A muddied research book dries as clean-up crews work at the Calgary Zoo in Calgary, Alberta, Canada on Tuesday, June 25, 2013. Heavy rains caused flooding, closed roads, and forced evacuations across Southern Alberta. Calgary Zoo staff risked their lives over the weekend to stop a hippo from escaping into the swollen Bow River. Director of animal care, conservation and research, Jake Veasey, says flood waters in the hippos' enclosure rose high enough during the floods for the dangerous herbivores to swim out. One hippo named Lobi was feeling particularly adventurous and was moving freely around the African Savannah building. Veasey had to break a window to get into the building and he swam in the muddy flood waters to find the animal. Zoo staff used cinder blocks and construction equipment to block Lobi inside the building. (AP Photo/The Canadian Press, Jeff McIntosh)

  • A soldier walks by a pile of speedboats in High River, Alberta on Tuesday, June 25, 2013. High River was hit by a devastating flood on June 20 which caused a mass evacuation of the entire town although some residents chose to defy the order. Alberta's premier pledged $1 billion on Monday to help people recover from the floods. (AP Photo/The Canadian Press, Jordan Verlage)

  • Clean-up crews work at the Calgary Zoo in Calgary, Alberta, Canada on Tuesday, June 25, 2013. Heavy rains caused flooding, closed roads, and forced evacuations across Southern Alberta. Calgary Zoo staff risked their lives over the weekend to stop a hippo from escaping into the swollen Bow River. Director of animal care, conservation and research, Jake Veasey, says flood waters in the hippos' enclosure rose high enough during the floods for the dangerous herbivores to swim out. One hippo named Lobi was feeling particularly adventurous and was moving freely around the African Savannah building. Veasey had to break a window to get into the building and he swam in the muddy flood waters to find the animal. Zoo staff used cinder blocks and construction equipment to block Lobi inside the building. (AP Photo/The Canadian Press, Jeff McIntosh)

  • Wreckage lies along Center Street in High River, Alberta on Tuesday, June 25, 2013. High River was hit by a devastating flood on June 20 which caused a mass evacuation of the entire town although some residents chose to defy the order. Alberta's premier pledged $1 billion on Monday to help people recover from the floods. (AP Photo/The Canadian Press, Jordan Verlage)

  • A road crew foreman surveys the washed-out lanes of northbound MacLeod Trail in Calgary, Alta., Monday, June 24, 2013. Heavy rains caused flooding, closed roads, and forced evacuations across Southern Alberta. (AP Photo/The Canadian Press, Jeff McIntosh)

  • Thaya Gallant

    Thaya Gallant helps with the flood clean-up at a law office in Calgary, Alta., Monday, June 24, 2013. Heavy rains caused flooding, closed roads, and forced evacuations across Southern Alberta. (AP Photo/The Canadian Press, Jeff McIntosh)

  • Calgary firefighters check on home as residents and volunteers are in clean up mode in the community of Bowness as most of the homes have been pumped out with still some remaining submerged in water in Calgary, Alberta on Monday, June 24, 2013. Alberta's premier pledged $1 billion on Monday to help people recover from floods that devastated parts of the western Canadian province. (AP Photo/The Canadian Press, Nathan Denette)

  • People watch as the river peaks, causing flooding in Medicine hat, Alta., on Monday, June 24, 2013. Officials in Medicine Hat said Monday they believe water levels on the South Saskatchewan River have peaked and that flooding won't be as severe as initially feared. Roughly 10,000 people were evacuated as the city of 60,000 prepared for the surge of water that swamped Calgary and surrounding areas last week. (AP Photo/The Canadian Press, Nathan Denette)

  • Residents and volunteers are in clean up mode in the community of Bowness as most of the homes have been pumped out with still some remaining submerged in water in Calgary, Alberta on Monday, June 24, 2013. Alberta's premier pledged $1 billion on Monday to help people recover from floods that devastated parts of the western Canadian province. (AP Photo/The Canadian Press, Nathan Denette)

  • Lisa Nguyen

    Resident Lisa Nguyen, right, cleans of the mud from photographs and negatives as volunteer Jacinta Babbitt, left, shows a clean picture of Nguyen when she was younger during flood clean up in the community of Bowness in Calgary, Alberta on Monday, June 24, 2013. Alberta's premier pledged $1 billion on Monday to help people recover from floods that devastated parts of the western Canadian province. (AP Photo/The Canadian Press, Nathan Denette)

  • Residents and volunteers are in flood clean up mode in the community of Bowness in Calgary, Alberta on Monday, June 24, 2013. Alberta's premier pledged $1 billion on Monday to help people recover from floods that devastated parts of the western Canadian province. (AP Photo/The Canadian Press, Nathan Denette)

  • Daniel Boddy, nine, helps with the clean-up work as hose lines from pumps drain water from flooded basement in the Bridgeland neighborhood in Calgary, Alta., Sunday, June 23, 2013. Heavy rains caused flooding, closed roads, and forced evacuation across Southern Alberta.

  • Daniel Boddy, nine, helps with the clean-up work as hose lines from pumps drain water from flooded basement in the Bridgeland neighborhood in Calgary, Alta., Sunday, June 23, 2013. Heavy rains caused flooding, closed roads, and forced evacuation across Southern Alberta.

  • A boy crosses a silt covered street in Chinatown as clean-up crews work in Calgary, Alta., Sunday, June 23, 2013. Heavy rains caused flooding, closed roads, and forced evacuation across Southern Alberta.

  • People place sand bags as the river rises rapidly and begins flooding in Medicine Hat, Alberta, on Sunday, June 23, 2013.

  • Homeowner Glenn Tibbles looks at the damage done by floodwaters to his home near downtown Calgary, Alberta, on Sunday, June 23, 2013. About 65,000 residents of Calgary were being allowed to return to their homes Sunday to assess the damage from flooding that has left Alberta's largest city awash in debris and dirty water.

  • Cpl. Brett Martens from CFB Edmonton helps a resident clear out damaged debris from their home near downtown Calgary, Alberta, on Sunday, June 23, 2013. About 65,000 residents of Calgary were being allowed to return to their homes Sunday to assess the damage from flooding that has left Alberta's largest city awash in debris and dirty water.

  • A home is inundated with floodwaters on the Siksika First Nation, Alberta, on Sunday, June 23, 2013. Alberta's municipal affairs minister says 27 communities are under a state of emergency as some areas begin to recover from flooding while others are still bracing for it.

  • People watch as the river rises rapidly and begins flooding in Medicine Hat, Alta., on Sunday, June 23, 2013. THE CANADIAN PRESS/Nathan Denette

  • Floodwaters inundate homes in Medicine Hat, Alberta, on Sunday, June 23, 2013. Alberta's municipal affairs minister says 27 communities are under a state of emergency as some areas begin to recover from flooding while others are still bracing for it.