最近為啥大溫四周水面不時有轟鳴?

Have you ever heard a foghorn? Ships are required to use them in low visibility, like recent fog around Vancouver Harbour, to signal their presence and prevent collisions. It’s the sound of ships keeping everyone safe! pic.twitter.com/Da5HQQfTuN

— Port of Vancouver (@PortVancouver) January 21, 2026

The fog horn, sounds like a lonely cow in the night here in vancouver 😂😭

— rishabh jain (@idejeevna) January 20, 2026