An emergency notification system was the target of a cyberattack that exposed users' personal data, and several Northern California agencies were affected.

CodeRED, an emergency alert system used by counties, law enforcement and other agencies to warn citizens of active incidents. On Nov. 10, the company said it experienced a national outage that was the result of a cybersecurity incident. Users' names, addresses, email addresses, phone numbers and associated passwords were accessed.

Users who may use the same passwords for other websites are urged to change their passwords as soon as possible.

Sutter, Nevada and Glenn counties, the town of Truckee and the Yuba County Office of Emergency Services said they were affected by the cyberattack.

The Northern California agencies said the outa

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