A foggy night occurs when moisture in the air condenses into tiny water droplets, creating a thick layer of fog. This phenomenon can significantly reduce visibility, making it difficult to see more than a few feet ahead. Fog is most common in areas near water bodies, such as lakes or oceans, and often forms when warm, moist air meets cooler temperatures. During a foggy night, streetlights and car headlights may appear diffused and glow softly through the haze. This can create an eerie atmosphere, as sounds may also be muffled, making the environment feel quieter. Drivers should exercise caution, as fog can lead to hazardous driving conditions.