Environment Canada Issues Rainfall Alert for Toronto and Durham
Residents in Toronto and the Durham Region are being advised to prepare for continued heavy rainfall and unseasonably cold temperatures, as Environment Canada has issued an official rainfall warning that will remain in effect until Thursday evening.
According to the national weather agency, up to 60 mm of total rainfall is expected by the end of the day Thursday, creating conditions ripe for localized flooding and hazardous road travel.
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Over Half the Rain Has Already Fallen
As of midday Thursday, 35 mm of rain had already fallen in the affected areas. However, an additional 20 to 25 mm is still expected, especially in areas east of the Don Valley Parkway, before the weather system weakens and transitions to light showers later in the evening.
The rainfall is part of a multi-day weather system that began on Wednesday and is expected to persist through late Friday, soaking much of southern Ontario.
Flash Flood Risk and Road Hazards
Environment Canada is warning that heavy downpours may lead to flash flooding and water pooling on roads, which can significantly reduce visibility and make driving dangerous.
“Watch for possible washouts near rivers, creeks and culverts,” the agency said, urging residents to avoid driving through large puddles and to remain alert for road closures in flood-prone areas.
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Coldest May Temperatures in Nearly Six Decades
Adding to the discomfort, Toronto is also experiencing one of its coldest late-May stretches in decades, with daytime highs hovering around 10 to 11 degrees Celsius. For perspective, that temperature is closer to what is normally expected overnight in May, not during the day.
Meteorologist Geoff Coulson from Environment Canada noted that Thursday’s high of 10°C is significantly below the typical seasonal average of 20°C.
“In fact, the record for the coldest daytime high temperature at Toronto Pearson Airport on May 22 is 9.4 degrees,” Coulson said, referencing a long-standing record set back in 1967.
Cold Front Responsible for Prolonged Chill
Coulson attributes this week’s cold snap to a cold front that swept through southern Ontario on Sunday, ushering in lower-than-average temperatures that have persisted throughout the week.
While this unusually chilly and wet weather may put a damper on late spring activities, officials stress the importance of staying safe on the roads and being aware of flash flood risks, especially in low-lying or poorly drained areas.
Stay Updated and Take Precautions
Residents are encouraged to monitor Environment Canada alerts, and check local news and weather updates frequently. Commuters should plan for potential travel delays, and pedestrians are urged to dress appropriately and take shelter when necessary.
If you live near waterways or flood-prone zones, take extra caution and secure any outdoor property that may be affected by rising water levels.