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The Toronto Area Is Bracing For Record-Breaking Rainfall & Flooding On Wednesday

Certain areas could see up to 40mm of rain and 40° heat.

It may be summer in Ontario, but this Wednesday is a day to take cover from the rain. Things could apparently get pretty bad around the GTA, as extreme Toronto weather has led to strong flood potential as a result of thunderstorm rainfall. It's also going to be dangerously humid, as if the rain weren't enough.

According to the Weather Network, the remnants of Tropical Storm Barry are bringing unusually fierce rain and tropical moisture levels, which are combining to create "unbearably high humidity levels."

As a result, the scattered thunderstorms that are tentatively expected across Wednesday have the potential to cause flash flooding in certain areas. An alert for the City of Toronto warned that up to 40mm of rain can be expected in certain areas.

That may be a worst-case scenario, but that much rainfall could challenge the May '17 record for rainfall in the city, which previously stood at 40.6mm, according to the The Star.

Meteorologist Kelly Sonnenburg says "We're watching the remnant moisture from storm Barry, what was once Hurricane Barry, which made landfall in the Gulf states last weekend as it tracks across southern Ontario [...] so that's really jam-packing the atmosphere full of moisture,"

Worsening the problem is that many of the expected storms will be slow-moving, therefore increasing the rainfall in a concentrated area and deepening the threat of localized flooding.

As the week goes on, the flood threats will turn into heat and humidity warnings. 

"The heat will peak on Friday and Saturday with truly tropical humidity. This will give us a dangerous humidex reaching the low to mid-40s," said meteorologist Dr. Doug Gillham.

That heatwave should hopefully end by late Sunday thanks to a cold front, although that itself is likely to bring one final round of thunderstorms. Yay.

"A pattern change early next week will bring an extended period of cooler weather (near seasonal and at times cooler than seasonal) for the final week of July and likely continuing at least into the first week of August throughout the Great Lakes region, including southern Ontario," Gillham added.

Editor's Note: This article’s cover image was used for illustrative purposes only.