Evacuation alert

An evacuation alert, or evacuation alarm, was used to signal a mandatory evacuation of a certain deck, ship, planet, or starbase. It was normally used during a catastrophic event such as a hull breach or a loss of antimatter containment. This was a higher alert state than battle stations or red alert.

In 2369, Lieutenant Commanders Data, Geordi La Forge, and Deanna Troi transported into the engine room of a Romulan ship where they found the ship's crew under evacuation alert. 

In 2371, Chief Miles O'Brien experienced a series of timeshifts into the future, one of which showed station Deep Space 9 put under evacuation alert prior to its destruction. 

During the failed Red Squad attack on a prototype Dominion warship, Nog triggered an evacuation alert from the USS Valiant (NCC-74210)'s conn.

After the Breen energy dissipator crippled the USS Defiant (2370), Captain Sisko ordered an evacuation of the ship, triggering an evacuation alert. .