https://www.washingtonpost.com/weather/2020/01/02/amid-bush-fire-crisis-this-weekend-may-bring-australia-its-most-dangerous-fire-weather-conditions-yet/

Weather during the next few days will be similar to what led to
the bush fire crisis in the first place: building heat in the southwestern
reaches of the country leading to “catastrophic” fire danger in some regions
Thursday and at least “extreme” fire weather danger in South Australia on
Friday. Even the city of Adelaide is expected to top 104 degrees (40 Celsius),
with temperatures inland climbing even higher, with high winds.

The combination of the heat and strong winds associated with a frontal system
will create explosive conditions for supporting extreme fire behavior, including
their rapid and unpredictable spread. Similar conditions have already proved
fatal to residents and firefighters, with the death toll as of Thursday standing
at 17 for the season.