vegetation, which provided habitat for 832 species of native vertebrate fauna. Seventy taxa had more than 30% of their habitat impacted, including 21 already identified as threatened with extinction . In addition, millions of people experienced levels of smoke 20 times higher than the government-identified safe level. The year 2019 had been Australia's warmest and driest year on record. In the summer of 2019/2020, the seasonal mean and mean maximum temperatures were the hottest by almost 1℃ above the previous record. Eight of the 10 hottest days on record for national mean temperatures occurred in December 2019. While the prevailing weather conditions were strongly influenced by the Indian Ocean Dipole pressure pattern, with a contribution from weakly positive ENSO conditions in the Pacific, the fact that Australia is approximately 1ºC warmer than the early 20th century demonstrates links to anthropogenic climate change. Eight climate models using event attribution methodologies  indicates that anthropogenic climate change made the heat conditions of December 2019 more than twice as likely .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report