Active Weather Alerts
Heat Warning
Issued: 4:56 AM Jun. 21, 2025 – Environment and Climate Change Canada
The first significant heat event of the season with dangerously hot conditions will begin this afternoon and is expected to continue through much of next week. What: Daytime highs of 31 to 36 degrees Celsius. Humidex values of 40 to 45. Overnight lows of 21 to 25 degrees Celsius, providing little relief from the heat. When: This afternoon through much of next week. Additional information: ### 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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