Active Weather Alerts
Yellow Warning - Heat
Issued: 11:01 PM Jun. 9, 2026 – Environment and Climate Change Canada
A heat event is expected to begin Wednesday. What: Daytime highs near 31 degrees Celsius. Overnight lows near 21 degrees Celsius. Humidex values between 36 and 40. When: Wednesday into Thursday. Additional Information: The heat event may continue Friday into Saturday, although confidence is low at this stage. Areas near Lake Huron and Lake Erie will likely be cooler. ### 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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