Meteorologists from Environment Canada are tracking a slow moving cluster of thunderstorms capable of producing localized flash flooding. 
 
 Severe thunderstorms that have caused flooding and power outages around the city Monday will likely exceed 100 mm of total rainfall before it tapers off later this evening, according to Environment Canada. 
 
 The thunderstorms are over the Mississauga and Brampton regions and moving slowly eastward toward Markham, Richmond Hill and Toronto. 
 
 The amount of rainfall has beaten the previous same-day rainfall record of 29.2 mm in 2008 and trounced the roughly 70 mm monthly average for July. 
 
 Toronto Hydro said that 250,000 customers are still without power around the city. Earlier in the day they said the storm had hit Etobicoke hard. 
 
 Enersource said 20,000 customers are still without power mostly south of the QEW in Mississauga. They estimate power to be restored around midnight, but they advise people to use power sparingly. 
 
 They added that crews are out and assessing the damage. 
 
 Powerstream said all power has been restored for Markham, Richmond Hill and parts of Vaughan after a loss of supply from Hydro One’s transformer station in Buttonville. They said that power was restored shortly after 10 p.m. 
 
 Due to severe flooding there is no TTC service at Downsview to St. Clair West, St. Andrew to Bloor, Lawrence to Finch, Jane to Kipling, and the Sheppard Line. 
 
 The Toronto Region Conservation Authority also warned that the banks of the Don River were at risk of collapse in the area of Hoggs Hollow in the area of Yonge St. and York Mills. 
 
 The TTC has stopped all subways due to signal and power issues throughout the city. Parts of Union Station have been sandbagged in order to stem the flow of water. 
 
 TTC Chair Karen Stintz said they have asked Hydro One to consider TTC a priority in regards to restoring power. She said it is hard to determine how many people are trapped underground on the subway system. 
 
 “This is a historic night of Toronto weather,” Stintz said. 
 
 Metrolinx said buses and trains have been affected due to severe rain throughout Greater Toronto and Hamilton area. 
 
 A portion of the track west of Long Branch is completely under water, which is making it difficult to operate GO trains along the Lakeshore West line. 
 
 A GO train is also partially submerged on the Richmond Hill line that left Union around rush hour. The murky brown water, which spilled through the bottom floor of the train and left roughly 1000 passengers stuck for more than three hours. 
 
 Toronto police’s Marine Unit has arrived on scene and they are evacuating passengers, starting with those who have medical issues. Roughly half of the people have been rescued from the train. 
 
 All flights at Billy Bishop Airport have now been suspended due to the storm, according to Pamela McDonald, spokeswoman for the Toronto Port Authority. 
 
 The ferry service has been suspended for passengers travelling to the airport, but arriving passengers are being transported. 
 
 Dozens of flights have also been delayed at Pearson. 
 
 The Don Valley Parkway is closed northbound and southbound from the Gardiner to Bayview and Bloor due to flooding. 
 
 Toronto police said significant rainfall has caused the banks of the Don River to overflow. They are urging people to stay at home if they can. 
 
 Toronto police and Toronto Fire have said there have been no injuries due to the storm. Toronto Fire also said that they received around 300 stacked calls in regards to the rain. 
 
 Toronto EMS are recommending people do not travel if they can as cars are creating obstacles for paramedics. They also said they have received a large number of people stuck in elevators. 
 
 The Toronto Region Conservation Authority also warned that the banks of the Don River were at risk of collapse in the area of Hoggs Hollow in the area of Yonge St. and York Mills. 
 
 Yorkdale and Sherway Gardens are both closed due to power failures. 
 
 Toronto’s Fringe Festival has also cancelled their performances tonight. They tweeted that the “priority is artist, staff and audience safety.” 
 
 Earlier Monday afternoon, Environment Canada issued two special weather statements — one for thunderstorms over southern Ontario and the other for local heavy downpours. 
 
 Environment Canada also recommends drivers avoid going through water on roads as even shallow fast moving water can sweep a vehicle away. 
 
 With files from The Canadian Press ||||| A severe thunderstorm caused flash flooding in Toronto, cutting power to at least 300,000 in Canada's largest city, shutting down subways, and leaving about 1,400 passengers stranded for hours on a commuter train filled with gushing water. 
 
 Stranded passengers are rescued from a flooded GO Train in Toronto on Monday, July 8, 2013. A severe thunderstorm forced the shutdown of Toronto's subways, cut power to 300,000 in Canada's largest city... (Associated Press) 
 
 A woman gets back in her car in flood water on Lakeshore West during a storm in Toronto on Monday, July 8, 2013. (AP Photo/The Canadian Press, Frank Gunn) (Associated Press) 
 
 Stranded passengers are rescued from a flooded GO Train in Toronto on Monday, July 8, 2013. A severe thunderstorm forced the shutdown of Toronto's subways, cut power to 300,000 in Canada's largest city... (Associated Press) 
 
 A GO Train is stranded on flooded tracks in Toronto on Monday, July 8, 2013. A severe thunderstorm forced the shutdown of Toronto's subways, cut power to 300,000 in Canada's largest city and caused Porter... (Associated Press) 
 
 Stranded passengers await rescue on a flooded GO Train in Toronto on Monday, July 8, 2013. A severe thunderstorm forced the shutdown of Toronto's subways, cut power to 300,000 in Canada's largest city... (Associated Press) 
 
 A GO Train is stranded on flooded tracks in Toronto on Monday, July 8, 2013. A severe thunderstorm forced the shutdown of Toronto's subways, cut power to 300,000 in Canada's largest city and caused Porter... (Associated Press) 
 
 A woman gets back into her flooded car on the Toronto Indy course on Lakeshore Boulevard in Toronto on Monday, July 8 2013. (AP Photo/The Canadian Press, Frank Gunn) (Associated Press) 
 
 In this photo provided by Michael Li, water rises in a GO Train stranded on flooded tracks in Toronto on Monday, July 8, 2013. A severe thunderstorm forced the shutdown of Toronto's subways, cut power... (Associated Press) 
 
 Stranded passengers are rescued from a flooded GO Train in Toronto on Monday, July 8, 2013. A severe thunderstorm forced the shutdown of Toronto's subways, cut power to 300,000 in Canada's largest city... (Associated Press) 
 
 A tow truck driver floats a car out of the Don Valley Parkway in Toronto on Monday, July 8 2013. (AP Photo/The Canadian Press, Frank Gunn) (Associated Press) 
 
 Environment Canada said some parts of the city had been drenched with more than 3.9 inches (10 centimeters) of rain in the Monday evening storm, easily beating the previous one-day rainfall record of 1.4 inches (3.6 centimeters) in 2008. 
 
 Toronto police and firefighters used small inflatable boats to rescue commuters from a 10-car, double-decker train that stalled in floodwaters that reached up to the lower windows. Murky brown water spilled through the bottom floor of the carriages, sending passengers fleeing to the upper decks 
 
 A Metrolinx spokeswoman said power was shut off and the windows were cranked opened to provide ventilation. The train was carrying about 1,400 passengers during the Monday evening rush hour. 
 
 "There's a full-on river on either side of us... We. Are. Stuck. Hard," passenger Jonah Cait wrote on Twitter. 
 
 Another passenger told the TV news network CP24 that she could see people clinging to trees after abandoning their cars on a flooded highway alongside the tracks. 
 
 Police and firefighters used the inflatable boats to ferry all 1,400 passengers a short distance to higher ground. It took until about 12:30 a.m. to complete the rescue operation, about seven hours after it began. Passengers were transported to a nearby subway station to resume their trip home. 
 
 Emergency officials said five or six people were treated at the scene for minor injuries, but no one required hospitalization. 
 
 All of Toronto's subway service was temporarily halted due to power and signal issues. Some stations were also flooded. Partial service later resumed but large parts of the system were still shut down. It was unclear if the subway system would be in full operation by Tuesday morning. 
 
 The storm left the downtown core dotted with abandoned vehicles, some sitting in water up to their windows. One woman, in a T-shirt and shorts, dove head-first through the window of her marooned car before wading away in the thigh-deep currents. 
 
 Porter Airlines canceled all flights out of the downtown airport due to power outages in the terminal Monday evening. It was not clear how many flights were affected. 
 
 As many as 300,000 Toronto Hydro customers lost power. Toronto Hydro said about 200,000 customers were still without electricity as of 1 a.m. Tuesday, primarily in the west and northwest parts of the city. The utility could not say when it expected full power to be restored. 
 
 Another utility, Enersource, said power was cut to about 80 percent of Mississauga, a suburb of 700,000 west of Toronto. By around 10 p.m., only about 50,000 were without power. 
 
 Toronto's flash flooding comes two weeks after extensive flooding in Calgary turned parts of the western Canadian city into a lake and forced up to 100,000 Albertans from their homes. Three bodies were recovered during the floods.
– A record-breaking thunderstorm has caused chaos in Canada's biggest city, flooding roads and subway tunnels and leaving around 300,000 people without power. Close to 4 inches of rain was dumped on Toronto in the evening storm, the most rain the city has ever received in a single day and more than a month's average rainfall, the National Post reports. Police and firefighters had to use inflatable boats to rescue 1,400 passengers who had been stranded for hours on a commuter train stuck in floodwaters, the AP reports. To stay out of the water, passengers had to flee to the top deck of the double-decker train. "There's a full-on river on either side of us... We. Are. Stuck. Hard." one passenger tweeted. Abandoned cars have been spotted floating in the downtown area, but emergency services say there have been no reports of any deaths or injuries caused by the storm, the Toronto Star reports.