A cooler day today followed by more heat Sunday and Monday. What: Daytime highs of 31 to 33 degrees Celsius Sunday and Monday with slightly cooler temperatures today. Humidex values of 42 to 44. Overnight lows of 21 to 23 degrees Celsius, providing little relief from the heat. When: Sunday and Monday night. Additional information: Slightly cooler temperatures can be expected today, though daytime highs will still remain warm near 29 degrees Celsius and humidex values near 38. The extreme heat and humidity is expected to return on Sunday. ### 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.
