Environment Canada has issued a severe thunderstorm watch on Monday for most of southern Ontario as sweltering temperatures sweep the area.
“Conditions are favourable for the development of severe thunderstorms that may be capable of producing strong wind gusts, large hail and heavy rain,” a statement from the agency read.
Thunderstorms are possible for late morning and throughout the afternoon that could produce wind gusts of up to 100 kilometres per hour and downpours of 25 to 50 mm of rain.
A heat warning also remains in effect after sweltering hot temperatures left much of southern Ontario feeling a little sweaty this past weekend.
High temperatures,for the second consecutive day, are expected to reach just above the 30 C mark, but humidity will make it feel more like 40 C.
Environment Canada said extreme heat affects everyone, though some are more susceptible to risks associated with high temperatures.
“The risks are greater for young children, pregnant woman, older adults, people with chronic illnesses and people working or exercising outdoors,” the agency said.
WATCH: First heat wave of the year hits Ontario and B.C.
It also reminds Canadians that people or pets should never be left inside a parked vehicle in temperatures like this.
Global News meteorologist Anthony Farnell said the sky will clear tonight and the humidity will drop as well.
“The rest of the week looks great with plenty of sunshine and temperatures returning to normal for this time of year,” he said.