TORONTO -- Environment Canada issued a heat warning for Toronto on Sunday, saying temperatures with the humidity will feel like close to 40 C at times.

Meteorologists project temperatures will reach 32 C on Sunday, feeling like 38 to 40 C, while the mercury will hit 31 to 33 C on Monday with the humidity making it feel like 39 to 40 C.

They say the high temperatures will increase the risk of air pollution or smog.

"The risks are greater for young children, pregnant women, older adults, people with chronic illnesses and people working or exercising outdoors."

Everyone who is able should limit their time spent outside, and outdoor workers should hydrate well and take regular breaks in a cool place.