Environment Canada has lifted a fog advisory previously in effect for Toronto and parts of the Greater Toronto Area.

The advisory, issued Monday afternoon, also included Caledon, Mississauga, Brampton, Halton Hills, Milton and Durham regions.

It was lifted shortly before 5 p.m.

During a fog advisory, motorists are urged to use extra caution while driving as the dense fog could bring visibilities down to 100 metres.

The national weather agency said travel in some locations could be hazardous and encouraged drivers to turn on headlights and maintain a safe following distance on the roads.

“Visibility may be significant and suddenly reduced to zero,” Environment Canada said in the advisory. “Fog advisories are issued when near zero visibilities in fog are expected or occurring.”

Pearson International Airport has advised travellers to check the status of their flight before heading to the airport. Meanwhile, Billy Bishop Airport has either cancelled or delayed all of the scheduled flights for today.