Surprised the areas aren’t going 24/7 like the US local stations do.
While the commercial networks have broken into programming when needed, the ABC news channel was live 24/7 during the worst periods. The ABC is also the designated emergency broadcaster, and people here will generally tune to the ABC when there is an emergency. However if large scale fires occurred in areas such as the Dandenongs or the Blue Mountains, which are basically outer suburban Melbourne & Sydney, then the commercial TV coverage would probably be nearly 24/7 as well. The current Victorian fires are mostly in remote areas well away from Melbourne - Mallacoota is a 6 hour drive from Melbourne.
Another aspect is that people will also use radio as their primary source of info in these situations - in a bushfire, electricity is usually the first utility to fail, so people are told to keep a battery radio handy as part of their emergency kit. People are also advised to tune to their 'local' ABC station during a danger period so they can get information for their specific area.
This is a series of warnings from the local Melbourne ABC radio station a couple of weeks back