Today – July 4, 2020
Mainly sunny. Wind becoming north 20 km/h near noon. High 32. Humidex 36. UV index 10 or very high.
Tonight
Clear. Wind north 20 km/h becoming light this evening. Low 21.
Heat warning
Humidex values reaching 36 are expected for more than 5 days.
A prolonged period of hot weather is expected through the weekend into next week.
Daytime high temperatures in excess of 31 degrees Celsius, with humidex values in the high thirties to low forties, are expected for the foreseeable future. Overnight lows in excess of 21 degrees Celsius are also expected through this period, providing little relief from the heat.
Please refer to your public forecast for further details on expected temperatures.
Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching 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.
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.
Sun, 5 Jul – Sunny. High 33. Humidex 35. UV index 10 or very high. Night – Clear. Low 21.
Mon, 6 Jul – A mix of sun and cloud with 30 percent chance of showers. High 35. Night – Cloudy periods. Low 23.
Tue, 7 Jul – A mix of sun and cloud. High 34. Night – Cloudy periods with 30 percent chance of showers. Low 23.
Wed, 8 Jul – A mix of sun and cloud. High 33. Night – Cloudy periods. Low 22.
Thu, 9 Jul – A mix of sun and cloud. High 34. Night – Cloudy periods. Low 23.
Fri, 10 Jul – Cloudy with 60 percent chance of showers. High 33.
