I would put my money on the fact that many Australian fires were lit to cause intentional damage - either for land clearing or maliciously. There are many isolated intense agriculture businesses in close proximity to native forest in 200nm corridor along the east coast of NSW. They are putting huge stress on the remaining native forests.
If you fly the east coast regularly have a close look and see how the small scars of land clearing are starting in the once large and pristine areas. Notice how its close to the agribusinesses. And remember that many of these businesses are NOT Australian.
The Australian Amazon burning experience.
The government should respond with a nationalised squadron of water bombers and increase the national park expanse so that nature can recover.
Many land developers will be licking their lips in an effort to get in while the damage is done.