Homes, roads and livestock have been washed away or cut off in Australia as the country faces its worst flooding in decades.
Parts of New South Wales have seen almost 1m of rain and more is forecast with the peak coming on Tuesday.
Thousands of people have been evacuated and troops deployed as the government warned the floods were extremely dangerous.
Millions in most of the country are under weather warnings.
No deaths have been reported which New South Wales (NSW) Premier Gladys Berejiklian called a "miracle given what we have been through". Prime Minister Scott Morrison told MPs there was "serious risk still ahead"
In pictures: Australia's 'one-in-a-50-year' flood
Some 18,000 people have been evacuated so far in the state, including a 37-year-old woman in labour who was airlifted after being trapped by the flooding west of Sydney .
Presentational grey line
Spiders and snakes attempting to escape the floodwaters have been seen swarming inside resident's homes.
In one village south of Port Macquarie 889mm of rain was recorded between 9am Thursday and 9am Monday.
Scott Donnellan, a Presbyterian minister in Port Macquarie, told the BBC some people had toughed it out when the evacuation orders came but had to "abandon ship" when the water reached waist height.
He said the community was pulling together but was expecting "one final punch" from the weather.
What is the latest forecast?
The heaviest rainfall for the worst-affected state of NSW is expected overnight into Tuesday morning, as two major weather systems collide. The southern coastal areas could be the worst hit this time.
A tweet put out by Australia's Bureau of Meteorology said an area as large as Alaska - stretching from the NSW coast back to the Northern Territory - was now being affected by weather warnings.
media captionAustralia: New South Wales hit with heavy floods
In all, 10 million people are under warnings in every state and territory except Western Australia.
A low pressure weather system that has been inundating the NSW coast for days has now been met by another weather system inland that is moving east.
The bureau has forecast "increased rainfall, strong winds, damaging surf and abnormally high tides" in New South Wales on Tuesday.
"It may have been going for days but unfortunately this situation is far from over," the bureau tweeted.
Satellite image showing extent of flooding in western Sydney region on 21 March
Presentational white space
Its flood manager, Justin Field, said: "I've been a flood forecaster in the bureau for 20 years and this is probably the worst flooding that I've experienced and I've had to forecast.
"We've got a flood watch that covers all the way from the Queensland border down to the Victorian border."
PM Morrison told MPs on Monday: "Across NSW, 1,400 first responders have conducted over 700 flood rescues and responded to over 7,500 requests for assistance."
He added: "This is an ongoing situation that is evolving and is extremely dangerous."
Dogs are transported to safety in inflatable boats in Sydney
image captionDogs are transported to safety in inflatable boats in Sydney
The military is being deployed to help with search and rescue, in what has been called a "one-in-50-years event".
But the bureau did predict some respite, tweeting: "Most areas of New South Wales will see a clearing trend early Wednesday as a drier airmass moves into the region."
What has been the damage so far?
Days of torrential downpours have caused rivers and dams to overflow around Sydney - the state capital - and in south-east Queensland.
Some 200 schools in NSW will remain shut on Tuesday as the peak rainfall hits.
People in more than 15 mostly low-lying areas have been ordered to evacuate and a similar number have been given evacuation warnings.
An order requires people to seek shelter with family or friends well away from flood impacted areas, or in a special centre. The warning tells people to prepare for an evacuation order.
There have been some 15,000 evacuations from the Mid-North Coast and a further 3,000 in Sydney, officials said.
Areas around the Colo and Hawkesbury rivers are of particular concern. They are seeing the worst flooding since 1961.
Satellite image showing extent of flooding around Port Macquarie, New South Wales, on 21 March
Presentational white space
Among the incidents that have happened:
The Warragamba Dam, Sydney's main water source, spilled over for the first time in five years. It reached a peak daily discharge on Sunday of 500 gigalitres - equivalent to the volume of Sydney Harbour
In Port Macquarie's North Shore, one resident was filmed dragging a stingray through what was his front lawn
On Sunday a young couple saw their house north of Sydney swept away by flash floods on what should have been their wedding day
PM Morrison has offered a one-off federal government payment of A$1,000 ($775; £560) per eligible adult and A$400 per eligible child for those seriously affected by the floods.
From fires to floods
The intense summer of rain and floods in eastern Australia is a stark contrast to a year ago, when many of the same areas were scorched by mammoth bushfires and ravaged by drought.
This side of the continent is currently experiencing a La Niña weather pattern, which typically brings more rainfall and tropical cyclones during summer.
Two of Australia's three wettest years on record have been during La Niña events. Typically a La Niña sees a 20% increase in average rainfall from December to March in eastern Australia.
Scientists say that climate change is also intensifying La Niña's impact, and making weather patterns more erratic.
Meanwhile, Hungary has become the first EU country to approve use of China's CanSino Biologics coronavirus vaccine and CoviShield, the Indian version of the AstraZeneca vaccine, Reuters news agency reports.
EU states are allowed to strike separate deals with vaccine makers which have not signed agreements with the EU. Hungary is already using China's Sinopharm vaccine and the Russian Sputnik vaccine.
The EU regulator, the European Medicines Agency, has so far approved the vaccines of Pfizer-BioNTech, Moderna and AstraZeneca.
- Flоrіdа іѕ оnе of the states thаt has filed a lаwѕuіt аgаіnѕt the Affоrdаblе Care Act challenging thе соnѕtіtutіоnаlіtу оf the mаndаtе to gеt minimal health соvеrаgе. Whіlе ѕоmе politicians ѕееm tо thіnk they are experts оn how tо fix hеаlth care, whаt dо рhуѕісіаnѕ hаvе tо ѕау аbоut this?
- Mental Health Living Together Without Marriage Improves Mens Mental Health Being hitched has consistently been related with more
- Roots Analysis has announced the addition of the “Antibody Contract Manufacturing Market, 2020-2030” report to its list of offerings.