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Elev 344 ft, 43.16 °N, 79.24 °W

St. Catharines, Ontario, Canada Severe Weather Alertstar_ratehome

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Personal Weather Station
Location: St. Catharines, Ontario, Canada
Elevation: 344ft
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Heat Warning
Issued: 1:35 AM Aug. 9, 2025 – Environment and Climate Change Canada
Multi-day heat event beginning Saturday.  

What: 
Daytime highs of 30 to 33 degrees Celsius, with humidex values of 35 to 40. 
Overnight lows of 19 to 23 degrees Celsius.  

When: 
Beginning on Saturday.

Additional information: 
Slightly cooler temperatures are expected by the middle of next week, bringing an end to this heat event.

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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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