If visibility is reduced while driving, turn on your lights and maintain a safe following distance.
Near zero visibility in fog is expected or occurring.
Dense fog patches will dissipate in the morning.
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Visibility may be significantly and suddenly reduced to near zero.
Fog advisories are issued when near zero visibilities in fog are expected or occurring.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or tweet reports using #ONStorm.