special precautions; special vigilance
Used in contexts such as security, disaster prevention, or public safety to indicate heightened alertness or extra protective measures.
With the typhoon approaching, special precautions were urged in coastal areas.
The police stepped up special vigilance in response to the terrorist threat.
警戒 is general vigilance or alertness, while 特別警戒 specifically refers to heightened or special precautions beyond the usual level.
Compound of 特別 (special) and 警戒 (vigilance, precautions).