Conditions are favourable for the development of dangerous thunderstorms that may be capable of producing strong wind gusts and torrential rain.Hazards:Wind gusts up to 90 km/hTorrential rainfallWhen:This afternoon through this evening.###Utility outages are possible.Heavy rain can cause flash flooding and significant reductions to visibility.Strong wind gusts can damage trees, buildings and overturn vehicles.Severe thunderstorm watches are issued when conditions are favourable for the development of thunderstorms capable of producing damaging hail, wind or rain.Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.For more information: https://www.ontario.ca/page/be-prepared-emergency.

Hot and humid conditions expected today and Wednesday. What:Daytime highs of 28 to 31 degrees Celsius and a humidex of 33 to 38.Overnight lows of 19 to 23 degrees Celsius, providing little relief from the heat.When:Today through Wednesday.Additional information:Hot and humid conditions are expected. A slightly cooler airmass is expected to arrive on Thursday bringing an end to this heat event.###For more information: https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/how-protect-yourself.html https://www.canada.ca/en/health-canada/services/climate-change-health/extreme-heat/who-is-at-risk.htmlPlease continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.