You mean the bushfires which have to date exceeded the total area burned in 74-75 in NSW[1]? Which are noted from that article as having a decidedly different burn characteristic then 74-75 which was mostly grassland, as opposed to the forest fires we currently have, including large areas of rainforest in Queensland which has not previously been dry enough to support a bushfire?
[1] https://www.theguardian.com/australia-news/2020/jan/07/recor...