Alert OC Regional Test Wednesday September 17 2025.
Alert OC Regional Test Wednesday September 17 2025 is at 10:00am.
Alert OC is Orange County California mass notification system.
Orange County Sheriff Department explains on their Facebook Page “On Wednesday September 17 2025 we’ll be testing our county’s AlertOC system with a large-scale drill.
This test will simulate a major emergency, dialing thousands of numbers simultaneously across the county to test the system’s capabilities.”
Make sure you’re ready: Sign up for Alert OC and verify your info at AlertOC.gov
This system is your lifeline for urgent updates, whether it’s evacuating due to an emergency or receiving crucial health alerts.
Visit ReadyOC.com for more information on emergency preparedness.
Participating cities include:
• Aliso Viejo
• Brea
• Buena Park
• Costa Mesa
• Cypress
• Dana Point
• Fountain Valley
• Fullerton
• Garden Grove
• Irvine
• La Habra
• La Palma
• Laguna Beach
• Laguna Hills
• Laguna Niguel
• Lake Forest
• Los Alamitos
• Mission Viejo
• Rancho Santa Margarita
• San Clemente
• Santa Ana
• Seal Beach
• Stanton
• Tustin
• Westminster
• Yorba Linda
• County Unincorporated Areas
This system supplements, does not replace, other communication methods used by emergency responders.
During an emergency, County or city call-in emergency information lines will still be available.
Television, radio and county/city web sites will continue to broadcast important announcements as well.
You may sign up for Alert OC online or by texting ‘AlertOC’ to 888777
