Heat warning
Hot and humid tonight and possibly into Monday.
Daytime maximum temperatures: 30 to 32 degrees Celsius, with humidex values 40 to 42 beginning again today.
Nighttime minimum temperatures: 20 to 22 degrees Celsius.
Hot and humid air can also bring deteriorating air quality and can cause the Air Quality Health Index to approach the high risk category.
Extreme heat affects everyone.
The risks are greater for young children, pregnant women, older adults, people with chronic illnesses and people working or exercising outdoors.
Watch for the effects of heat illness: swelling, rash, cramps, fainting, heat exhaustion, heat stroke and the worsening of some health conditions.
Never leave people or pets inside a parked vehicle.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@canada.ca or tweet reports using #ONStorm.
Tonight
Mainly cloudy. 40 percent chance of showers early this evening. Showers beginning early this evening then changing to 30 percent chance of showers near midnight. Risk of a thunderstorm this evening and after midnight. Wind southwest 30 km/h becoming light late this evening. Low 21.
Mon, 30 Aug Clearing in the morning. Wind becoming west 20 km/h in the afternoon. High 28. Humidex 33. UV index 8 or very high. Night Clear. Low 15.
Tue, 31 Aug A mix of sun and cloud. High 25. Night Cloudy periods. Low 16.
Wed, 1 Sep A mix of sun and cloud. High 25. Night Clear. Low 13.
Thu, 2 Sep Sunny. High 25. Night Clear. Low 13.
Fri, 3 Sep Cloudy with 60 percent chance of showers. High 23. Night Cloudy with 60 percent chance of showers. Low 16.
Sat, 4 Sep A mix of sun and cloud. High 26.
