as in watch
the state of being constantly attentive and responsive to signs of opportunity, activity, or danger
the paparazzi were on red alert for sightings of the hot new Hollywood couple
Synonyms & Similar Words
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Antonyms & Near Antonyms
Example Sentences
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Recent Examples of red alert
In one of the latest instances of extreme weather, at least 30 people died this week on the outskirts of Beijing after the city issued the highest-level red alert for heavy rain, according to state media.
—
Evelyn Cheng, CNBC, 31 July 2025
Aviation officials issued a red alert for passing aircraft due to the height of the ash plume, which reached several kilometers into the atmosphere.
—Gabe Whisnant, MSNBC Newsweek, 30 July 2025
Over the weekend, Kerr County issued a code red alert because of an excessive rainfall forecast.
—Marlene Lenthang, NBC news, 14 July 2025
Italy, meanwhile, issued heat wave red alerts across 17 cities, including Milan and Rome.
—Karissa Waddick, USA Today, 2 July 2025
See All Example Sentences for red alert
Evelyn Cheng, CNBC, 31 July 2025
Aviation officials issued a red alert for passing aircraft due to the height of the ash plume, which reached several kilometers into the atmosphere.
—Gabe Whisnant, MSNBC Newsweek, 30 July 2025
Over the weekend, Kerr County issued a code red alert because of an excessive rainfall forecast.
—Marlene Lenthang, NBC news, 14 July 2025
Italy, meanwhile, issued heat wave red alerts across 17 cities, including Milan and Rome.
—Karissa Waddick, USA Today, 2 July 2025
See All Example Sentences for red alert
Recent Examples of Synonyms for red alert
Noun
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Or for the wide swaths of empty seats in the upper deck that formed after the New York Giants put the game in a vice grip with a three-score lead late in the third quarter and put the Broncos on shutout watch.—
Parker Gabriel,
Denver Post,
20 Oct. 2025
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This watch guide was created using technology provided by Data Skrive.—
Data Skrive,
New York Times,
19 Oct. 2025
Noun
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This patience is watchfulness, not idleness.—
Francois Botha,
Forbes.com,
7 Sep. 2025
Noun
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Motorists and recreational visitors in mountain regions are strongly advised to monitor NWS updates and the Washington State Department of Transportation (WSDOT) real-time travel alerts before and during their journeys.—
Jordan King,
MSNBC Newsweek,
18 Oct. 2025
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Staying alert and limiting what your AI agents can access is your best defense.—
Kurt Knutsson,
FOXNews.com,
18 Oct. 2025
Noun
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Allergy sufferers might not realize, however, that these symptoms reduce alertness and cognitive functioning – some of the factors that can worsen mental health and increase vulnerability to suicidal thoughts and behaviors.—
Shooshan Danagoulian,
The Conversation,
8 Oct. 2025
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Known to power all-around mental clarity, alertness, and focus, this powder is an ideal pick-me-up for a post-lunch afternoon work slump or mid-morning meeting.—
Brianna Peters,
Vogue,
1 Oct. 2025
Noun
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In summary, when facing the threat of lightning, preparedness and vigilance are your best allies.—
Bay Area Weather Report,
Mercury News,
14 Oct. 2025
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Leaders urge vigilance Leaders up and down the East Coast have told residents in their states to be cautious.—
Dakin Andone,
CNN Money,
12 Oct. 2025
Cite this Entry
“Red alert.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/red%20alert. Accessed 21 Oct. 2025.
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