Extending from west of the Manitoba-Ontario border to the Ottawa Valley, there are extreme heat warnings in effect
Daytime high temperatures near thirty with humidex values in the mid to high thirties are expected for the foreseeable future. Overnight lows near 18 are expected 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 to approach the high risk category.