Environment Canada warns of extreme heat in parts of southern Ontario

Christopher Davidson
June 19, 2018

Beginning Sunday, Environment Canada says the humidex value will reach 40 degrees.

Heat alerts are issued to underline health risks from the extreme weather, especially for the elderly. Monday's forecast includes an expected high of 31 C, or slightly cooler by the lake with temperatures around 26 C, and that is going to feel like 40 C with the humidex.

It says the mercury will only drop to the low 20s overnight, offering little relief from the heat.

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The damp conditions will lead us into the cold front moving across southern Ontario.

Heat warnings were in effect for wide parts of southern Ontario on Sunday, affecting a region stretching from Windsor up Southwestern Ontario's spine to southern Huron County and as far east as Durham region, east of Toronto.

The heat poses the greatest risks for young children, pregnant women, older adults, people with chronic illnesses and people working or exercising outdoors, Environment Canada said in the warning updated at 5:07 a.m. ET. You should also never leave people or pets inside a parked vehicle.

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