Evacuation alert

From Memory Alpha, the free Star Trek reference

Evacuation alert is an alert used to signal a mandatory evacuation of a certain deck, ship, planet, starbase, etc. Normally used during a hull breach or loss antimatter containment. This is a higher alert state than battlestations/red alert.

When Data, Geordi La Forge, and Deanna Troi transported into engine room of a Romulan ship in 2369, they found that the ship's crew under an evacuation alert. (TNG: "Timescape")