Most of Ontario, including Toronto, Mississauga, Hamilton, and Niagara, York, and Durham regions, is under a heat warning as temperatures are forecasted to reach the high 20s to low 30s over the next several days.

Early Tuesday morning, Environment Canada advised people to expect humid, hazy, and hotter-than-usual conditions that could actually feel more like the high 30s to low 40s.

“So it's going to feel like jungle humidity: sultry and oppressive. And, and those temperatures always seem a little bit more difficult, hard to handle, and unhealthy when you have that humid air.”

Phillips also noted that previous bouts of high heat across Ontario and Quebec have come with cooler nights, which isn’t the case this time around.

“The nights are going to be warm up 20, 22 degrees. There’s a lot of tossing and turning when you get those kind of conditions. So these are kind of like the dog days of summer and they've started in July and hey, get used to it. I mean, this is this is summer in Eastern Canada.”

This "multi-day heat event" is expected to last until Thursday.