Getting around and out of the city is a bit touch-and-go Wednesday, as commuters and travellers make their way through thick morning fog for the second day in a row.

In a special weather statement issued overnight, Environment Canada urged motorists to use extra caution when driving on fog-shrouded roads.

"Fog will be dense at times reducing visibility to 200 metres or less," the agency said, predicting conditions would improve as the fog lifts throughout the morning.

In the meantime, travellers planning to fly to destinations throughout southern Ontario should check with the airline before setting out.

Noting the similar weather advisories also issued for Sudbury, Timmins, Thunder Bay, Sault Ste. Marie and Chicago, Toronto-island based Porter Airlines is warning its customers flights could be cancelled or delayed as a result.

At Pearson International Airport, Air Canada is warning its customers that: "Flights may be impacted by forecasted low ceilings, fog and reduced visibility and subsequent Air Traffic Control restrictions."

The rest of Wednesday looks better, with a forecast high of 10 C and sunny conditions. But Environment Canada is calling for a third night of fog, with more mist expected to shroud the city after midnight.