Driving in fog, fog advisoryPhoto by chris-mueller / iStock / Getty Images Plus
Midwestern

Fog blankets parts of southwestern Ontario

A fog advisory has been issued for London and Eastern Middlesex County, parts of Elgin County including St. Thomas and Aylmer, and Northern Perth County.

Environment Canada warned that dense fog patches will persist through Saturday morning.

Drivers are advised that travel may be hazardous. Visibility may suddenly be reduced to near zero in some locations.

The fog is expected to dissipate by Saturday afternoon.

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