Sarnia-Lambton remains shrouded in fog.
Environment Canada has issued a fog advisory for the region for Sunday evening into Monday.
The weather agency says visibility is near zero in some areas.
Dense fog patches are expected to move across the area Sunday night and become more widespread.
Fog should finally lift sometime Monday morning.
Fog advisories are issued when visibility is at or near zero due to fog conditions.
Travel may be challenging due to low visibility.
Keep following BlackburnNews.com for the latest weather updates.