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Feeling like the 40s: Late summer sizzler hits southern Ontario

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    Digital writers

    Wednesday, September 11, 2013, 7:04 AM -

    Hot, sticky summer weather made a comeback across much of southern Ontario on Tuesday.

    On Monday, Environment Canada issued a humidex advisory for much of the region, with Tuesday afternoon's temperatures soaring into the mid-30s. Factor in the humidity and it felt like closer to 45 in some places.

    Tuesday's heat breaks records

    In Toronto, the warmest day of the year so far was on July 19th when temperatures hit 34.9°C at Pearson airport.

    Pearson's weather station didn't set any records today, settling at 33.9°C -- but records were set elsewhere.

    Buttonville airport recorded a high of 35°C. Kitchener-Waterloo also set a new record for the region, reaching 34.1°C, and Windsor wasn't too far ahead, peaking at 34.2°C.

    The late summer sizzler prompted the City of Toronto to issue a heat alert, reminding residents to drink plenty of water and check on those more vulnerable to the extreme heat. This is the first heat alert since mid-July. 

    According to Environment Canada, breezy conditions should help to alleviate the muggy weather somewhat, but a very warm night is expected with evening temperatures likely in the mid to high 20s.

    The heat and humidity are expected to ease over eastern Ontario on Wednesday, while much of the Greater Toronto Area and southwestern Ontario will continue to see humidex values near 40. There's also the potential for severe thunderstorms across the region.

    After that, "a cold front moving through Wednesday afternoon or evening will sweep out this sultry tropical airmass and in its wake temperatures are expected to return to near seasonal values by Thursday," Environment Canada adds.

    By Friday, temperatures will take a significant plunge with a daytime high of around 15°C forecast.

    "Jackets required by Friday!," tweeted The Weather Network's chief meteorologist, Chris Scott. 

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