Massive bushfires were blazing in Australia on Sunday.  

The major blaze was in the Wollemi National Park, northwest of Sydney.  

An emergency warning has been issued for the Gospers Mountain blaze, which was 37,000 hectares in size.  

A forecast heatwave sweeping toward the eastern parts of the country will further increase the fire risk next week.   

So far,  at least four people have died and over 680 homes across eastern Australia have been destroyed since November.