Toronto braces for more flooding due to heavy rainfall

Click to play video: 'Heavy rain washes through the GTA, more flooding expected' Heavy rain washes through the GTA, more flooding expected
WATCH ABOVE: Another bout of heavy rain is making its way across the GTA, making this the third significant rainfall in August. The downpour could last most of the day and raises flooding concerns. Marianne Dimain reports – Aug 21, 2018

Residents in Toronto are bracing yet again for possible flooding due to heavy rainfall on Tuesday.

The city is under a severe thunderstorm watch with showers and thunderstorms expected throughout the day.

Environment Canada said the rain will be “periodic” with breaks in between. However, torrential downpours for short periods are also likely.

READ MORE: Rainfall warning issued for cottage country, chance of heavy rain in southern Ontario

Global News Meteorologist Ross Hull said the city could receive between 30 and 50 millimetres of rain by Tuesday evening.

Hull said flash flooding is a possibility.

Localized flooding and road conditions

The on-ramp from Dundas Street East to northbound Don Valley Parkway was temporarily closed due to flooding Tuesday morning but it has since been reopened.

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Areas prone to flooding such as York Street and along Lower Simcoe in downtown Toronto will be a concern for pedestrians and drivers.

GO Transit officials are warning commuters to keep an eye out for pooling water near Union Station, Toronto’s transportation hub, and to cross at designated crosswalks.

“We’re working with the city of Toronto who owns the infrastructure at Union Station and around Union Station to ensure that flooding doesn’t occur and if it does occur then we can react and promptly get people to where they need to go in a different route to make sure they aren’t in harms way and stay as dry as possible,” Metrolinx spokesperson Anne Marie Aikins told Global News on Tuesday.

City officials are reminding motorists to plan ahead and to drive according to the changing weather conditions.

Due to possible pooling on some roadways, drivers should reduce their speed and use extra caution.

Watershed conditions for Toronto

The Toronto and Region Conservation Authority (TRCA) says the rain is expected to be widespread across watersheds, with a risk of thunderstorms from late morning to early evening that could lead to higher localized rainfall totals.

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WATCH: Heavy rainfall over the DVP

Click to play video: 'Toronto braces for more flooding due to heavy rainfall' Toronto braces for more flooding due to heavy rainfall
Toronto braces for more flooding due to heavy rainfall – Aug 21, 2018

Rivers within the Greater Toronto Area may experience higher flows and water levels, resulting in potential flooding and hazardous conditions. Ponding may also occur in low-lying areas.

Residents are urged to exercise caution around all bodies of water.

Residents told to clear catch basins to prevent flooding

Toronto residents are being told to clear debris from roadside catch basins to help water enter the storm sewer and prevent possible flooding.

READ MORE: Toronto rain storm: What to do if your home is flooded

Heavy rainfall on Aug. 7 caused a number of flooded basements across the city and some homeowners blamed the city for not doing enough to fix or replace its aging infrastructure.

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