Environment Canada says it's expected to last all morning, use caution when driving
Another warning from Environment Canada concerning fog for the Niagara region.
The fog advisory is expected to last all morning, completely reducing visibility at times.
Caution is advised when driving.
The fog impacted Toronto's Pearson Airport, it didn't allow planes to take off yesterday.
The airport says on foggy days, Nav Canada regularly assesses visibility and adjusts hourly flight arrivals and departures for safety.

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