Active Weather Alerts
Heat Warning
Issued: 8:55 AM Aug. 13, 2025 – Environment and Climate Change Canada
Multi-day heat event ending later today. What: Daytime highs of 30 to 33 degrees Celsius, with humidex values of 37 to 40. Overnight lows of 20 to 23 degrees Celsius. When: Coming to an end later today. Additional information: A cooler and less humid air mass will slowly move in from the northwest today, bringing the heat event to an end later today. Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching the high risk category. ### Heat warnings are issued when very high temperature or humidity conditions are expected to pose an elevated risk of heat illnesses, such as heat stroke or heat exhaustion. 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.html 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.
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