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  Storm Center: Weather Alerts: Warnings


 
My Location: San Francisco, CA 
 
Current Time: 07:37:11 PM PDT
Other Alerts  
Weather Alert
    Other Weather Alerts
Type Heat Warning

Special Weather Statement
Issued By
Issuing Time Fri, 08 Aug 2025 11:31:40 PDT
Broadcast Time Fri, 08 Aug 2025 11:31:40 PDT
Valid Until Sat, 09 Aug 2025 03:31:40 PDT
Brief Description Heat Warning
Detailed Description 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. ### 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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