on red alert
on red alert
In the highest possible state of readiness to address or prepare for some imminent danger, threat, trouble, or difficulty. The soldiers patrolling the border are on red alert. As soon as I heard my window break in the middle of the night, I was on red alert to fight off an intruder.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
on ˌred aˈlert
prepared for an emergency or for something dangerous to happen: Following the bomb blast, local hospitals have been put on red alert.Farlex Partner Idioms Dictionary © Farlex 2017