Heat warning in effect as ‘dangerous heat’ set to begin

After Friday marked the first official day of summer, Saturday brought thunderstorms, and Sunday is expected to mark the first of several ‘extreme’ heat days across Central Ontario.

According to Environment Canada, the Simcoe Muskoka region is one of many under a widespread heat warning for dangerous heat and humidity expected to last from Sunday afternoon until Tuesday.

Daytime highs could reach 36 degrees and humidex values could reach 45. Overnight lows are expected to remain above 21 degrees, providing little relief from the heat.

The weather agency urges protective action to prevent heat illness and to monitor signs of heat exhaustion. 911 should be called immediately in the event of heat stroke.

The heat warning extends across almost all of Southern and Central Ontario, as far southwest as Windsor, as far north as the Huntsville area, and as far northeast as the Quebec border.

Environment Canada experts say they expect this summer to be another hot one after the warmest summer on record two years ago and second warmest in Canada last year.

With files from CTV’s Kim Phillips and Rob Cooper.