The sultry weather is expected to last all week in the GTA, in southern Ontario

Environment Canada says residents of southern Ontario will be relieved of heat during the night, but daytime temperatures are expected to remain torrid.

The agency issued Thursday a warm warning for the long weekend of Canada Day. The impending heat wave is "the most important heat event" that Ontario has experienced in recent years

The heat warning is spreading in the GTA and in most southern areas from Ontario, including Hamilton, Waterloo and Barrie. Published Monday morning, Environment Canada said a cold front expected to cross the province is expected to bring relief to the heatwave, lowering overnight temperatures in high teens for the next two days.

However, the highs of the day should be in the low 30s, with wet values ​​probably reaching the low 40s.

"High heat and humidity could come back on Wednesday," l & # 39, heat warning lit. "The highs of the day will approach mid-thirties with wet mid-40s, nighttime low temperatures are expected to be in their twenties, with the exception of adolescents raised in some rural areas, bringing little or no relief from the heat. "

The pbadage of a cold front with a 30 percent chance of rain Friday It is expected that it helps to temper the heat, leading to a more seasonal summer season the following weekend.

According to Environment Canada, the highest of the day in Toronto will be 31 C on Tuesday, 32 C on Wednesday and 32 C on Thursday. Friday should be 28 ° C with 40 percent chance of showers

The extended heat warning of Toronto remains in effect

A prolonged heat warning issued by the medical officer of health indeed.

In response to the prolonged heat warning, the city has opened a number of cooling centers around Toronto. These centers are air conditioned and the staff will have bottled water available for all who need it.

The city also extended its opening hours in eight outdoor pools during the heat wave. Facilities open until 11:45 pm Monday includes Sunnyside Park / Gus Ryder Pool on Lake Shore Boulevard and Alexandra, McGregor and Monarch Park Pools