A mayor on New South Wales' mid-north coast said on Friday the bushfires ripping through the region were "horrifying and horrendous beasts".
"We still haven't got intelligence from a number of the fire grounds that we know have been impacted dramatically", Fitzsimmons told Nine Network television.
"Sadly, we have lost two Australians and I fear that we will lose more before the day is out", Mr Morrison said as hundreds of civilians also volunteered to help their hard-hit neighbours.
Around a hundred blazes pockmark New South Wales and Queensland countryside, with around 17 of them remaining unsafe and uncontained.More news: Italy to include climate change on school curricula
Emergency services said they had found the remains of one person in a auto and another woman died despite medics struggling for several hours to save her.
The fire service said in a Twitter post that a number of blazes "are becoming more intense" and "more unsafe". He urged residents to "stay safe" and "listen to emergency services".
Australia had an early and fierce start to its bushfire season, with an elderly couple killed in a blaze in October.
The fact the blazes were spread along a roughly 1,000-kilometre stretch of the seaboard left emergency services struggling to cope, even with the help of around 70 aircraft.
A series of "unprecedented" bushfires are raging through Australia's southeastern state of New South Wales, with more than 1,000 firefighters battling 17 emergency-level blazes and strong winds expected into the night.More news: England recall Bairstow as injury cover for NZ Tests
Across the central coast smoke could be seen billowing high into the sky and residents took to social media to post photos and videos of smoke-laden tangerine skies and flames engulfing stories-tall eucalypts within sight of their homes.
While Ashton said the figures were not updated after Friday's renewed fires, she noted that around two-thirds of the koala's habitat in the area had been destroyed previously, and predicted that as many as 350 koalas may have perished in total.
People in the path of a large, unpredictable and fast-moving bushfire at Tarome in the Scenic Rim area were also told they were in danger and should leave before it was too late.
Authorities said some of the fires were creating their own weather conditions - pyrocumulus clouds that enveloped entire towns. But a prolonged drought and low humidity levels will continue to make circumstances combustible.
Earlier this month, some of the same fires cloaked Sydney in hazardous smoke for days.More news: Recent Match Report - Australia vs Pakistan 3rd T20I 2019
Swathes of Australia have gone months without adequate rainfall, forcing farmers to truck in water at exorbitant cost, sell off livestock or leave their land to lay fallow.