(in military or civilian defense) the most urgent form of alert, signaling that an enemy attack is believed to be imminent.
a signal or warning that a critical situation is developing or has occurred.
the period during which a state of crisis or danger is declared to exist.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use red alert in a sentence
Emergency management officials issued a red alert after scientists observed tremors on the island’s only active volcano that indicated a heightened risk of eruption as magma broke up rocks and moved near the surface.Volcano on St. Vincent erupts, spewing column of ash amid evacuations | Teo Armus, Anthony Faiola, Matthew Cappucci | April 9, 2021 | Washington Post
Perhaps by then, scientists will be able to give earlier red alerts to warn of an incoming storm, giving more time to move satellites, buttress transformers and stave off the worst.Solar storms can wreak havoc. We need better space weather forecasts | Ramin Skibba | February 26, 2021 | Science News
red alert, which alerts users every time a rocket is fired into Israel, has already been downloaded 780,000 times.
Despite the detractors, red alert has become so ubiquitous that even the government is aware of it.
Seeking much-needed peace of mind, she downloaded red alert, an app that goes off every time a rocket is fired into Israel.
This was the fourth straight day of red-alert sirens wailing in Tel Aviv, and we were getting used to it.Red Alert in Tel Aviv: Fear Inside the Israeli City’s Bubble | Ethan Perlson | November 20, 2012 | THE DAILY BEAST
A little later, waiting for a friend outside a local bar, I thought about where I would run to if another red alert sounded.Red Alert in Tel Aviv: Fear Inside the Israeli City’s Bubble | Ethan Perlson | November 20, 2012 | THE DAILY BEAST
When the red alert flashed on throughout the ship it brought the others hurrying to the control cabin.Plague Ship | Andre Norton