Almanac note · Home and property
AlertSF is San Francisco's official emergency text alert
AlertSF is San Francisco’s official emergency text alert system. SF.gov explains that it sends official notifications about emergencies such as earthquakes, fires, flooding, tsunamis, and other city conditions.
The signup is useful even if someone does not live in San Francisco full time. People commute into the city, visit hospitals, go to games, take ferries, attend school, stay in hotels, and work near the waterfront. The ZIP code you choose should match the places where you want city alerts.
AlertSF is one layer, not the whole plan. Wireless Emergency Alerts may still come through automatically for some hazards, and public safety agencies may use other channels too. Sign up, save the official alert page, and use current city instructions during an event instead of relying on old screenshots or social media summaries.
Where to see it
SF.gov AlertSF signup page.
Official sources
Official source trail
Reviewed July 4, 2026
California Porch explains the path. The official source is still the place to confirm the current rule, fee, form, map, deadline, or office decision.
Use the official page before you spend money, file paperwork, rely on a deadline, or change a property.
Connected places
Where it fits on the map
Open a place page for the county layer, nearby places, and other California entries tied to that local page.
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