Published: Wed, July 04, 2018
Sci-tech | By Patricia Wade

Heat warnings in effect for Toronto, GTA this Canada Day weekend

Heat warnings in effect for Toronto, GTA this Canada Day weekend

A cold front is forecast to pass through southern Ontario this afternoon ushering in a slightly cooler and less humid air mass.

The warnings stretch from Sudbury and North Bay down to Windsor and east past Montreal.

The heat wave will finally come to an end on Thursday night but the reprieve from sweltering conditions may be short-lived, according to a senior climatologist with Environment Canada. The notice continues: "Daytime highs are expected to reach the low- to mid-30s with humidex values into the mid-40s".

Tuesday's forecast is for sunshine, a high of 32 C - Monday was 36 C - with a humidex of 36, a UV index of 9 or very high and a low of 20 C. "You can maybe turn off your air conditioner and enjoy a few days before the heat builds back up next week". Daytime temperatures will again be near 30 degrees, with humidex values in the mid 30s.

Overnight temperatures have hovered around the mid-20s during this heat wave but Phillips said that will change this weekend.

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Environment Canada also warns to watch out for serious medical conditions such as heat exhaustion and heat stroke, and to seek medical help if anyone is suffering from any of the symptoms of a heat-related medical emergency.

The hot temperatures and high humidity are expected to persist through at least Thursday.

Never leave people or pets inside a parked vehicle.

Without factoring in humidity, temperatures for the weekend could be as high as 23 C on Saturday, 26 C on Sunday and 24 C on Monday under mostly sunny skies.

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