I work in downtown Vancouver and live in small town Squamish about 45 min outside of Vancouver. There is a "system" that has kept the fog in Vancouver for the past week! It has been pretty scary driving in the morning and evening as we get closer to Vancouver. It's like driving in a white out with the fog being so heavy.
I'm happy that Squamish has had nothing but blue, sunny skies this past week, as I would go insane having to live day and night in this fog.