Extreme heat wave in Ontario continues for Canada Day

TORONTO — Canada Day revellers across much of Ontario will be partying in the heat today as high temperatures continue to make the province sizzle.

Orange heat warnings are blanketing Environment Canada’s weather map, stretching from Windsor to Toronto to Ottawa.

The weather agency says those southern areas can expect temperatures of up to 37 C.

There are also heat warnings in place for northern Ontario, where places like Sault Ste Marie, Timmins and Thunder Bay could see temperatures of up to 33 C, with humidex values near 40.

Environment Canada says the hot and humid conditions across the province could last through the weekend.

Health experts say those planning to celebrate Canada Day should limit their alcohol consumption as alcohol increases dehydration and raises the risk of heat-related illness like heatstroke.

This report by The Canadian Press was first published July 1, 2026.

The Canadian Press