Beachgoers are seen on Milk Beach as smoke haze from bushfires in New South Wales blankets the CBD in Sydney, Australia December 7, 2019. Picture taken December 7, 2019. AAP Image/Steven Saphore/via REUTERS

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

NSW Rural Fire Service and Fire and Rescue NSW crews work to protect a property on Kyola Road in Kulnura as the Three Mile fire approaches Mangrove Mountain, Australia, December 6, 2019. AAP Image/Dan Himbrechts/via REUTERS

Ash from bushfires that affected New South Wales in the last days is seen in the water on Balmoral Beach in Sydney, Australia, December 7, 2019, in this still image obtained from a social media video. IMOGEN BRENNAN/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 REUTERS

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

Ash from bushfires that affected New South Wales in the last days is seen on Balmoral Beach in Sydney, Australia, December 7, 2019, in this still image obtained from a social media video. IMOGEN BRENNAN/via REUTERS

A local man hoses down fire retardant during a bushfire in Werombi, 50 km southwest of Sydney, Australia, December 6, 2019. AAP Image/Mick Tsikas/via REUTERS

NSW Rural Fire Service crews protect properties on Waratah Road and Kelyknack Road as the Three Mile fire approaches Mangrove Mountain, Australia, December 5, 2019. Picture taken December 5, 2019. AAP Image/Dan Himbrechts/via REUTERS

NSW Rural Fire Service crews protect properties on Waratah Road and Kelyknack Road as the Three Mile fire approaches Mangrove Mountain, Australia, December 5, 2019. Picture taken December 5, 2019. AAP Image/Dan Himbrechts/via REUTERS

NSW Rural Fire Service crews protect properties on Waratah Road and Kelyknack Road as the Three Mile fire approaches Mangrove Mountain, Australia, December 5, 2019. Picture taken December 5, 2019. AAP Image/Dan Himbrechts/via REUTERS

Fire trucks are seen during a bushfire in Werombi, 50 km southwest of Sydney, Australia, December 6, 2019. AAP Image/Mick Tsikas/via REUTERS

A swimmer holds ash from bushfires that affected New South Wales in the last days on Balmoral Beach in Sydney, Australia, December 7, 2019, in this still image obtained from a social media video. IMOGEN BRENNAN/via REUTERS

Fire fighting crews from the Rural Fire Service (RFS), NSW Fire and Rescue and National Parks and Wildlife Service (NPWS) officers fight a bushfire encroaching on properties near Lake Tabourie, Australia, December, 5, 2019. Picture taken December 5, 2019. AAP Image/Dean Lewins/via REUTERS

People watch as smoke from the Green Wattle Creek fire is seen from Echo Point lookout in Katoomba, New South Wales, Australia, December 6, 2019. AAP Image/Steven Saphore/via REUTERS

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

A NSW Rural Firefighter establishes a backburn during bushfires in Mangrove Mountain, New South Wales, Australia, December 8, 2019. AAP Image/Jeremy Piper/via REUTERS

Ash from bushfires that affected New South Wales in the last days is seen on Balmoral Beach in Sydney, Australia, December 7, 2019, in this still image obtained from a social media video. IMOGEN BRENNAN/via REUTERS

Smoke of fire rise next to firefighting vehicles as bushfires burn in Newnes Plateau, New South Walles, Australia, December 7, 2019 in this picture grab obtained from a social media video on December 8, 2019. Gena Dray via REUTERS