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  Storm Center: Weather Alerts: Warnings


 
My Location: San Francisco, CA 
 
Current Time: 08:29:33 AM PDT

Other Alerts  
Weather Alert
    Other Weather Alerts
Type Heat Warning
Issued By
Issuing Time Tue, 12 Aug 2025 08:26:15 PDT
Broadcast Time Tue, 12 Aug 2025 08:26:15 PDT
Valid Until Wed, 13 Aug 2025 00:26:15 PDT
Brief Description Heat Warning
Detailed Description Hot weather continues Maximum temperatures between 30 and 34 degrees Celsius combined with high humidity will generate humidex values near 40. Nights will also be warm, with overnight lows of 20 degrees Celsius or more, providing little relief from the heat. Conditions will begin to improve during the day on Wednesday. More seasonal daytime highs and lower humidity are expected on Thursday. ### 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 QCstorm@ec.gc.ca or post reports on X using #QCStorm.
       
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