Usage patterns
〈場所〉に濃霧が発生するdense fog occurs in 〈場所〉
Dense fog occurred around the airport.
濃霧のため〈事〉due to dense fog, ~
The flight was cancelled due to dense fog.
濃霧に包まれるto be enveloped in dense fog
The whole town was enveloped in dense fog.
濃霧で視界が悪いvisibility is poor because of dense fog
Visibility is poor due to dense fog, so caution is needed when driving.