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Expected thunderstorms could bring heavy rain, hail, warns Environment Canada

Severe thunderstorms forecast to develop this afternoon into this evening
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WEATHER ALERTS
ENVIRONEMNT CANADA
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Severe thunderstorm watch in effect for:
    •    Guelph - Erin - Southern Wellington County
    •    Kitchener - Cambridge - Region of Waterloo
    •    Mount Forest - Arthur - Northern Wellington County

Conditions are favourable for the development of severe thunderstorms that may be capable of producing strong wind gusts, large hail and heavy rain.

Scattered thunderstorms are forecast to develop this afternoon into this evening. The main threat from these thunderstorms will be isolated areas of heavy rain exceeding 50 mm in an hour.

Lightning kills and injures Canadians every year. Remember, when thunder roars, go indoors!

Severe thunderstorm watches are issued when atmospheric conditions are favourable for the development of thunderstorms that could produce one or more of the following: large hail, damaging winds, torrential rainfall.

The Office of the Fire Marshal and Emergency Management recommends that you take cover immediately if threatening weather approaches.

Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to [email protected] or tweet reports using #ONStorm.

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Heat Warning in effect for:
    •    Guelph - Erin - Southern Wellington County
    •    Kitchener - Cambridge - Region of Waterloo
    •    Mount Forest - Arthur - Northern Wellington County

A period of hot weather continues.

Daytime high temperatures in excess of 30 degrees Celsius, with humidex values in the high thirties to low forties, are expected. Overnight lows near 20 degrees Celsius are also expected through this period, providing little relief from the heat.

A slightly cooler airmass may move into the area this weekend, however there is considerable uncertainty. A few areas towards eastern Ontario are likely to experience extreme heat and high humidex values on Saturday as well.

Please refer to your public forecast for further details on expected temperatures.

Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching the high risk category.

The risks are greater for young children, pregnant women, older adults, people with chronic illnesses and people working or exercising outdoors.

Check on older family, friends and neighbours. Make sure they are cool and drinking water.

Never leave people or pets inside a parked vehicle.

Keep your house cool. Block the sun by closing curtains or blinds.

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