Wildfires razing Australia's drought-stricken east coast have left two people dead and several missing, more than 30 injured and over 150 homes destroyed, officials said on Saturday.
About 1,500 firefighters were battling more than 70 fires across Australia's most populous state, New South Wales, with the most intense in the north-east where flames were fanned by strong winds, Rural Fire Service Commissioner Shane Fitzsimmons said.
Another seven people have been reported missing in the vicinity of the same fire.
"We are expecting that number [of missing people] to climb today," Mr Fitzsimmons said. "There are really grave concerns that there could be more losses or indeed more fatalities."
Vivian Chaplain, a 69-year-old mother of two and grandmother of six, was alone in her house in the small community of Wytaliba when it was engulfed in flames, her daughter-in-law Chrystal Harwood said.
"I was the last one to speak to her. She was in an absolute panic. She said: 'We're on fire. There's fire everywhere. I need the boys here now,'" Ms Harwood said of their final phone call.
More than 30 people including firefighters received medical treatment for burns and one patient had a cardiac arrest, he said.
At least 150 homes had been destroyed since Friday, and damage assessment teams had yet to reach some devastated areas, a Rural Fire Service statement said. Residents could not yet return because of the dangers of fire, smoke and loose asbestos in the rubble, it said.
Hundreds of people evacuated their homes along a 500-kilometre swathe of the eastern seaboard from the Queensland state border south to Forster.
Forster is a town 300km north of Sydney, Australia's largest city. Many spent the night in evacuation centres while some slept in cars.
In Queensland, more than 30 wildfires were raging on Saturday. At least one house was lost, a firefighter suffered a broken leg and 6,000 residents were evacuated from three communities in the state's south-east, Police Inspector Rob Graham said.
Prime Minister Scott Morrison warned Australia to expect more bad news from the fire zones.
"The devastating and horrific fires that we have seen, particularly in New South Wales but also in Queensland, have been absolutely chilling," Mr Morrison told reporters in Sydney.
In the New South Wales town of Taree, more than 300 people sought shelter overnight in a social club.
"It was pretty scary," said Morgan Stewart, chief executive of Club Taree. "We're hearing lots of stories of lost houses, lost property, goods and effects, animals, land. It's going to be horrific, I think."
Peter Lean spent the night on the roof of his house in the town of Wallabi Point, extinguishing burning embers carried on strong winds.
"I've never seen the sky so red since 2000," Mr Lean said. "We've got winds blowing, they're circling, it's like a cyclone."
The fire danger reached unprecedented levels in New South Wales on Friday, when 17 fires were burning at the most extreme danger rating known as the Emergency Warning Level.
"I can only recall a figure of less than 10 that we [previously] got to, which was an extraordinary event in years past," Mr Fitzsimmons said.
"The fact that we have 17 at once yesterday and another nine burning at Watch and Act [Level] is a magnitude that we simply haven't seen before, commanding so much attention, so much priority, so much competition for resources and need to get to different communities," he said.
Three fires were burning at the highest danger rating by Saturday.
The annual Australian fire season, which peaks during the southern hemisphere summer, has started early after an unusually warm and dry winter.