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9 storiesLatest update October 3, 2026
Representative editorial illustration of a hot sunny day in San Francisco with people seeking shade and the city skyline in the distance.

Weather · Air Quality

San Francisco Heat Advisory and Spare the Air Alert: What to Know This Weekend

Unusually warm October weather arrives with an ozone Spare the Air Alert Saturday and Sunday, while outdoor events draw large crowds across San Francisco.

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Current conditions, forecast periods and alerts are sourced from the National Weather Service API. SF News Today adds local reporting when a forecast or alert creates a practical city impact.

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