Almanac note · Home and property
County alerts and phone alerts are two different layers
CalAlerts explains Wireless Emergency Alerts and county signups, which work together but do not reach people in exactly the same way.
Emergency alerts are not one single bucket. Wireless Emergency Alerts can reach mobile phones in an affected area without a signup. County alert systems are different. They often let you register addresses, phone numbers, emails, and other contact choices.
That layered setup is useful in a state with fires, storms, floods, heat, road closures, earthquakes, and local police or fire activity. A person may want alerts for home, work, school, a relative’s house, or a cabin.
Use CalAlerts to find the county signup page. Then add the places you actually care about. Keep phone settings on for emergency alerts too. During an incident, use the newest message from local public safety officials. Alert details can change as conditions move.
Where to see it
CalAlerts Wireless Emergency Alerts and county alert signup pages.
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.
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