One person has died near Adelaide while 23 firefighters have been injured as they battle more than 100 bushfires.
There are warnings of "catastrophic" conditions as strong winds and temperature continue to rise in New South Wales.
Authorities have warned that they will not be able to help everyone and several highways have been closed.
Around 7.4 million acres of land has burned across the country because of the bushfires which has also killed nine people so far.
Meanwhile, holiday-makers travelling to the southern part of Australia for Christmas are being urged to postpone their trips at least for 24 hours.


US considering 'winding down' military efforts in Iran, says Trump
Iran ready to let Japanese vessels transit Hormuz, Kyodo reports
Putin tells Tehran: Russia stands by Iran
Israeli military says it is striking Hezbollah targets in Beirut
US sending marines and amphibious assault ship to Middle East
