The Fog advisory has been lifted for London and Middlesex region
The fog advisory was in effect for the parts of southwestern Ontario for most of the morning.
The advisory affected London, Parkhill, Eastern and Western Middlesex Country, Strathroy and Komoka.
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Environment Canada reported near-zero visibility due to the fog, with visibility improving throughout the morning.
The national weather agency is advising drivers to slow down, watch for tail lights and be prepared to stop if needed.