TORONTO — Environment Canada has issued a heat warning for parts of southern Ontario this weekend, with humidex values expected to make it feel like 40 C.
The alert issued Friday afternoon says daytime highs between 31 and 33 C can be expected on Saturday and Sunday.
It says overnight lows are projected to sit around 21 to 25 C, providing little relief from the heat.
The heat is expected to break Sunday night.
People are advised to drink water, limit direct exposure to the sun and plan outdoor activities during the coolest parts of the day.
This is the second heat warning issued for southern Ontario this summer, after extreme heat reaching the mid-30s broke temperature records in many parts of the province on June 22 and 23.
This report by The Canadian Press was first published July 4, 2025.
The Canadian Press
