A Spare the Air alert is in effect Monday for moderate to poor air quality.
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The hottest days will be Tuesday and Wednesday with widespread 90s/100s
It has been two years since San Francisco has been in the 90s, and there's a good chance that happens Tuesday.
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How to survive a prolonged heat wave
There are currently only light offshore winds in the forecast (5 - 15mph), no Red Flag Warnings but still elevated fire danger with the heat
It will be slightly cooler by Friday, but no dramatic cool down as the upcoming weekend is still warm.
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