Pedestrians are seen wearing masks as smoke haze from bushfires in New South Wales blankets the CBD in Sydney, Australia, December 10, 2019.( AAP Image/Steven Saphore/via REUTERS )

Ferries docked at Circular Quay after services were cancelled as smoke haze from bushfires in New South Wales blankets the CBD in Sydney, Australia, December 10, 2019. (AAP Image/Joel Carrett/via REUTER)

A seagull perches on a sign as a ferry can be seen through smoke haze from bushfires, in Sydney, Australia, December 10, 2019. (REUTERS/Stephen Coates)

The Sydney Opera House can be seen as smoke haze from bushfires in New South Wales blankets the CBD in Sydney, Australia, December 10, 2019. (AAP Image/Joel Carrett/via REUTER)

Liam Hatcher of the Blues stands in the outfield amid the smoke haze from bushfires during day 3 of the Sheffield Shield cricket match between New South Wales and Queensland at the SCG in Sydney, Australia, December 10, 2019. (AAP Image/Craig Golding/via REUTERS)

A ferry sails on the harbor as thick smoke settles in Sydney, Australia, Tuesday, Dec. 10, 2019. Hot dry conditions have brought an early start to the fire season. (AP Photo/Rick Rycroft)

Thick smoke from wildfires shroud the Opera House in Sydney, Australia, Tuesday, Dec. 10, 2019. Hot dry conditions have brought an early start to the fire season. (AP Photo/Rick Rycroft)