Swaths of southern Ontario could see severe thunderstorms and flash floods on Sunday amid extreme heat.
Environment and Climate Change Canada has issued heat warnings and thunderstorm watches for parts of the province, as well as a thunderstorm warning for Stirling, Tweed and Madoc.
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Forecasters say the area halfway between Toronto and Ottawa could see wind gusts up to 90 kilometres per hour and hail the size of nickels.
Meanwhile, police in Toronto say they received reports of water pooling on the Don Valley Parkway on Sunday morning.
A thunderstorm watch was in effect for the city, and police say some lanes of the DVP were restricted.
The heat in southern Ontario, where humidex values have reached 40 C, could last until Thursday.
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