Volkswacht Bodensee - Australia orders 200,000 to flee floods moving towards Sydney

Authorities issued severe rain and wind warnings for a 400-kilometre (250-mile) stretch of coast as water levels rose rapidly -- including in suburbs around Sydney, Australia's largest city and home to five million people.

The unpredictable storm front has crawled southwards along the east coast from Queensland to New South Wales, creating havoc as rivers and reservoirs broke their banks with water swamping homes up to their roofs.

"Many people are waking up today to see much of our state underwater," New South Wales Premier Dominic Perrottet said.

"If you are subject to one of those evacuation orders, please get out," he told a news conference. "Things will get worse before they get better."

Authorities have ordered 200,000 people to evacuate their homes, and warned another 300,000 may soon have to join them.

The Warragamba Dam in southwestern Sydney, which supplies 80 percent of the city's water, has been spilling over since the early hours of Wednesday, accelerating the flooding in some areas.

-'Devastating scenes' -

New South Wales meteorologist Dean Narramore predicted the storm would dump 50-150 millimetres of rain during the day in areas including in and around Sydney, possibly more in areas struck by thunderstorms.

"That could lead to dangerous and life-threatening flash flooding," he warned.

Meteorologist Ben Domensino of Weatherzone said the storm was being fuelled by an "atmospheric river" -- a long stream of airborne moisture.

Scientists say climate change is making Australia's floods, bushfires, cyclones and droughts more frequent and more intense.

"Australia is at the forefront of severe climate change," said environmental expert Hilary Bambrick of the Queensland University of Technology.

"Temperatures are rising faster in Australia than the global average, and higher temperatures mean the atmosphere holds more moisture, meaning rainfall events are becoming more extreme."

In New South Wales, emergency services chief Carlene York said the storm was "difficult to predict" as she warned of a tough day across Sydney and other parts of the state.

- 'Drought, fires, floods' -

Taronga Zoo, located along Sydney Harbour, prepared for an influx of injured wildlife from torrential rainfall and flooding.

The first fear was for young wildlife, small animals –- including echidnas and bandicoots -– and birds unable to escape surging floodwaters.

Heavy downpours can make birds' feathers so waterlogged they are unable to fly, a spokeswoman told AFP.

As the floodwaters recede, concern will turn to the animals living in fresh water, including platypuses.

Across New South Wales, flood levels have climbed to the highest level in decades.

In towns such as Lismore in the state's northeast, which is now cleaning up as floods recede, people had clambered onto their rooftops, sometimes waiting many hours to be rescued from rising waters.

New South Wales said it was sending an extra 400 personnel to that region to help people on the "very, very long road" to cleaning up and recovering.

"Many people today in the Northern Rivers and over the last 24 hours have returned home, and they have returned home to devastating scenes," state premier Perrottet said. "My message is we will be with you."

"But our people have stood tall," Perrottet said.

K.Thomson--BTB