The network consists of 122 All-Hazard Alert Broadcast tsunami sirens dotted along the Washington coast. When necessary, the sirens will wail, then release evacuation instructions in English and Spanish. The sirens can be heard from a mile away and topped with a blue light for those who are hearing impaired.
Once they are up and running, the sirens will be regularly tested at noon on the first Monday of every month ringing a Westminster chime instead of the full siren warning. Annually on the third Thursday in October, the sirens will be tested “at full wail” as part of the Great Washington ShakeOut statewide preparedness event, according to the port.
The port and the city’s emergency management team will work with the community on how to prepare and respond in the event of a tsunami.
More information is available at https://mil.wa.gov/tsunami#sirens.