be on alert
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The State Department recently warned fans attending games in Mexico to be on alert for pickpockets and scams, and to avoid hailing roadside taxis.
From The Wall Street Journal • Jun. 11, 2026
After the Joshua Tree earthquake, the Governor’s Office of Emergency Services issued an advisory for Southern California, warning people to be on alert for another, larger earthquake.
From Los Angeles Times • Dec. 22, 2025
"There is the side to social media that is really harmful and really scary, and you have to be on alert all the time," she told BBC News.
From BBC • Nov. 25, 2025
Anyone playing in the already-volatile small-cap arena should be on alert to avoid getting burned.
From Barron's • Nov. 18, 2025
Whether or not a human knew what they were, an instinct inside them knew to be on alert, to be just a little afraid.
From "Night Owls" by A.R. Vishny
