TORONTO, Ont. – Environment Canada has issued a fog advisory for parts of Ontario, including the Greater Toronto Area.

In a special weather statement, the agency warns that widespread fog, which developed overnight, will linger into the morning and reduce visibility to 200 metres or less at times

Air Canada urges travellers to check their flight status ahead of arriving at Toronto Pearson International Airport.

When the fog dissipates, temperatures Thursday are forecast to climb to 13 C with mainly sunny skies.