All Hazard Alert Broadcast (AHAB) Sirens: The Mount Rainier Lahar Siren project is part of an overall emergency communications system for Pierce County. The focus for the sirens is to warn the residents in the Puyallup River Valley of the need to evacuate due to a volcanic disaster from the Mount Rainier Volcano. When imminent volcanic danger threatens, the sirens will be activated. Citizens will be advised to evacuate the valley floor and head to higher ground by vehicle or foot. The outdoor lahar warning sirens are tested at noon on the first Monday of every month. The sirens wail for approximately five minutes during the testing. During a real event, the sirens will continuously wail until the batteries die or they are destroyed.