Environment Canada has issued a warning for a multi-day summer program for GTA and all southern Ontario starting on Sunday.
The National Weather Service says that people can expect a height of the day between 30 and 34 C, which can be with a Humidex that will make it feel like 42.
There will be no relief from heat at night with climbing between 19 and 23C.
All of Southern Ontario, with lake eri and lake Ontario, expected to feel the effects of the heat wave
Environment Canada says, “It is expected to be the hottest conditions on Monday,” it is uncertain to add the duration of heat in some areas.
“In Central Ontario, the heat phenomenon may end on Monday night. In some areas, the heat phenomenon may persist in Wednesday.”
Wildfire smoke can also return to GTA starting on Monday, combining with warm and humid conditions.
This summer is another heat warning for Ontario, where the temperature records in many parts of the province last month broke during an extreme summer wave.