Reports of very dangerous conditions with the fire advancing very quickly and that the brushfires are creating their own "weather system".
The bushfires ravaging Australia are generating so much heat that they are creating their own weather systems including dry lighting storms and fire tornadoes.
Authorities warn Australian bushfires developing their own weather systems
Authorities warn Australian bushfires developing their own weather systems
Thick plumes of smoke rise from bushfires at the coast of East Gippsland, Victoria
On Saturday (Jan 4), the New South Wales Rural Fire Service (RFS) warned that a fire on the coast was generating its own weather system 287 km south of Sydney.
The weather conditions are the results of the formation of pyrocumulonimbus clouds. They have been recorded all over the world but as the global climate changes, they may become a more frequent occurrence for Australians, the country's Climate Council said in a 2019 report.
A RFS firefighter was killed on Monday by a fire tornado caused by the collapse of a pyrocumulonimbus cloud formation that rolled over the fire truck he was in.
Shane Fitzsimmons, the NSW RFS commissioner, pointed to that death when asked about the fire-induced weather patterns.
"That extraordinary event resulted in cyclonic-type base flipping over a 10-tonne truck. That is the volatility and danger that exists," he said.
The pyrocumulonimbus clouds are essentially a thunderstorm that forms from the smoke plume of a fire as intense heat from the fire causes air to rise rapidly, drawing in cooler air, according to information from the Australian Bureau of Meteorology.
As the cloud climbs and then cools in the low temperatures of the upper atmosphere, the collisions of ice particles in the higher parts of the cloud build up an electrical charge, which can be released as lightning.
These can cause dangerous and unpredictable changes in fire behaviour, making them harder to fight as well as causing lightning strikes that could ignite new fires.
The rising air also spurs intense updrafts that suck in so much air that strong winds develop, causing a fire to burn hotter and spread further.
'Too late to leave': Bushfires out of control across southeast Australia
'Too late to leave': Bushfires out of control across southeast Australia
The sky glows red as surrounding wildfires close in on the town of Mallacoota, Victoria, Australia, Jan 4, 2020, in this photo obtained from social media. (Photo: Reuters)
Authorities said the worst of conditions was yet to come. By late afternoon, Victoria had 17 fires rated at emergency or evacuate warning levels and New South Wales (NSW) had 12 fires rated emergency, with more than 100 others burning across the states.
South Australian Premier Steven Marshall said more than 100,000 hectares of Kangaroo Island, about one quarter of its total area, had been burnt, but weather conditions have now improved after Friday's fires.
The first of thousands of residents and vacationers stranded on a beach in Mallacoota in southeastern Australia landed near Melbourne on Saturday morning after a 20-hour journey by ship.
A much bigger ship, carrying about 1,000 people, is due to arrive on Saturday afternoon.
An Australian firefighter on New Year's Eve. (AFP/SAEED KHAN)
Bushfires rage out of control across southeast Australia
Bushfires burned dangerously out of control on Australia's east coast on Saturday, fanned by high temperatures and strong winds that had firefighters battling to save lives and property, as a change in wind conditions merged several large fire fronts.
Australian government deploys army reservists, third navy ship to support firefighters
The Australian government said on Saturday that
up to 3,000 army reservists would be deployed to help communities hit by spreading wildfires and a third navy ship had been readied to support evacuations from coastal towns.
Pillars of fire and smoke from bushfires are tarnishing Australia's reputation for pristine vistas abounding in wildlife and wreaking havoc on tourism, operators say, as authorities are forced to cancel concerts, close parks and evacuate towns.