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Sweltering humidity in ON, QC

Alexandra Pope, staff writer

June 9, 2011 — Some southern Ontario cities, including Toronto, saw record-breaking heat and humidity Wednesday.

Record-breaking heat
Record-breaking heat

Toronto's Pearson International Airport hit a high of 33.4°C, breaking a 61-year-old record for June 8th heat. Ottawa also broke an old record with a high of 33.2°C.

But the hotspot in Canada was Windsor, which hit a steamy 35.6°C for the first time since July 8th, 2007.

Dayna Vettese, a meteorologist at The Weather Network, said a warm front was to blame for the temperature spike.

“There was an upper level ridge building in, so we've got an open flow from the Gulf of Mexico,” she explains. “They're up to 100°F in the south, and we've got an open highway all the way from the Gulf to us.”

Toronto's Medical Officer of Health declared a Heat Alert for the city. During a heat alert, the public is encouraged to “beat the heat” by drinking water and staying hydrated, staying in air-conditioned places, staying out of the sun and reducing strenuous outdoor activity.

It's going to be a hot one in southern Ontario and Quebec Wednesday
It's going to be a hot one in southern Ontario and Quebec Wednesday

On Tuesday afternoon, Air Quality Ontario issued a smog advisory for extreme southwestern Ontario, including Windsor and Sarnia. The advisory urged people to avoid strenuous activity outdoors and “spare the air” by taking public transit or carpooling where possible.

With the heat and humidity came several waves of severe thunderstorms.

More thunderstorms are expected to pop up along a cold front Thursday morning. The good news is the front will leave cooler, drier and sunny conditions in its wake.

With files from Lyndsay Morrison

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