Mendocino county will be establishing pre-defined evacuation zones for future emergencies. In preparation, the Mendocino County Sheriff’s Office and the Office of Emergency Services will be launching the “Know Your Zone” campaign. Tomorrow from 12 p.m. until 1 p.m., there will be a test of the new Wireless Emergency Alert activation protocols, new online resources, and new predefined evacuation zones. The Wireless Emergency Alert system is similar to the Amber Alert system in which you will hear a special tone and vibration on your mobile device, which will repeat twice. Participants will also receive a short text message directing them to online resources.