Environment Canada issues heat warning for Peterborough and the Kawarthas for the weekend

A hot and humid air mass will affect the area until at least Sunday

Hot sun in the sky (stock photo)

The heat is on — again.

Environment Canada has issued a heat warning for the greater Kawarthas region — including Peterborough, Kawartha Lakes, Northumberland, and Hastings — for the weekend.

A hot and increasingly humid air mass will affect south-central Ontario and the Greater Toronto Area from Friday (July 17) through at least Sunday (July 19).

Slightly cooler and less humid conditions may arrive on Monday.

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Daytime high temperatures between 31°C to 34°C are expected, with humidex values near 40°C on Saturday, in the low 40s on Sunday, and in the high 30s on Monday.

Overnight low temperatures will range from 21°C to 24°C.

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

Watch for the effects of heat illness: swelling, rash, cramps, fainting, heat exhaustion, heat stroke and the worsening of some health conditions.

Never leave people or pets inside a parked vehicle. When it’s hot eat cool, light meals. Outdoor workers should take regularly scheduled breaks in a cool place.

Environment Canada issues heat warnings are issued when very high temperature or humidity conditions are expected to pose an elevated risk of heat illnesses, such as heat stroke or heat exhaustion.