be on guard

The weather service is urging residents to be on guard for fast-spreading blazes, power outages and downed trees.

Be on guard for phishing and other social engineering attempts, in the form of emails or phone calls purporting to be from the hacked organization or someone offering help.

Mr Sunak urged people to be "on guard" against those who want to "subvert our democracy".

Its state security agency was urging people to be on guard against American spies.

“The world we are in now, you always have to be on guard,” says Tameka Felts, a church trustee who also is licensed to carry.