Environment Canada has issued a fog advisory for the city of Toronto, warning of reduced visibility on Thursday.
The weather agency issued the advisory just before 4 p.m. on Thursday, saying near zero visibility in fog is expected in some areas.
Environment Canada said areas of dense fog have developed west of Lake Ontario Thursday afternoon.
“Fog may persist for a few hours before lifting [Thursday] evening,” the weather agency said in the advisory.
Environment Canada said if visibility is reduced while driving, motorists should turn on their lights and “maintain a safe following distance.”