Marin updates emergency alert system

January 16, 2013 7:23:30 PM PST
Marin County is upgrading its emergency notification system. Cellphone users who want to receive notifications on your will have to register their phone number.

The notifications aren't just for Marin County residents, but also those who work or go to school there.

Listed and unlisted landline numbers in Marin County are already in the new system. Cellphone and voice over internet protocol numbers require registration.