Coastal town Narrabeen, on Sydney’s northern beaches, experienced heavy rainfall and high winds on Saturday and Sunday, June 4-5. ABC reported that residents living near the lake were advised to evacuate. The Daily Telegraph reported that members of the State Emergency Service went door-to-door in Narrabeen to warn residents of flooding. The Bureau of Meteorology warned of “severe winds, heavy rainfall, abnormally high tides and damaging surf” throughout much of the coast across the weekend. On Sunday, it forecast that Sydney would receive 70-120mm of rainfall and coastal winds up to 70km/h. Coastal researcher Dr Mitchell Harvey tweeted that waves during the weather event were estimated to have reached 11 metres. This video shows a woman in the Northern Beaches moving through flooded roads. Credit: Instagram/serenareid_

SYDNEY’S northern beaches have copped an absolute battering overnight, as huge seas swept away the yards of multi-million-dollar beachfront homes.

Up to 10-15 metres of waterfront land washed away at Collaroy overnight as residents returned to their homes to assess the damage after being evacuated on Sunday night.

In total, seven homes and a unit block in Collaroy were evacuated as 8m waves slammed the coast leading to major erosion, police said.

A devastated Zaza Silk, from Collaroy, described her “worst nightmare” as she watched her pool and garden slip into the ocean after the savage storm.

“Within three hours we had a garden that was just totally destroyed — gone,” she told Channel Seven’s Sunrise program as she looked at her home from police tape as the sun rose on Monday.

She described how the water got “closer and closer” until police told residents to evacuate.

“I never thought it would be this bad,” she said.

Ms Silk told Sunrise she had lost about 15 metres of coastline from her beachside property, likening the devastation of the storm to an earthquake.

“There’s no garden now, where do we go? I have a dog, where is it going to go?” she said.

Another tide peak expected at 8.30am in Sydney's northern beaches. #sun7 https://t.co/8hIvbFNiDK — Sunrise (@sunriseon7) June 5, 2016

Collaroy homeowner Tony Cagorski said he and his family evacuated Sunday night at about 6pm and returned home this morning to survey the damage.

“It’s very scary, I hope we can save the house,” he told Channel Seven. “We were told to evacuate at about six, and I came back this morning and... Wow... It’s shocking,” he said.

Mr Cagorski’s home has suffered serious structural damage and the balcony has been left precariously teetering on the edge of the shoreline where his front yard once was.

“Now I know what Fiji went through and Vanuatu, it’s similar to that,” he said when asked to describe the storm.

Local resident Craig Graham has lived in Collaroy for nearly four decades and was among those checking out the damage Monday morning.

“It’s the worst I’ve seen it here... I have never seen it come up this high with this amount of storm surge and I’ve been living here about 40 years,” he told the ABC.

“It’s pretty much a disaster zone.”

Heavy rain is predicted to continue across central and southern parts of the state as the monster east coast low that lashed Queensland and NSW over the weekend heads south towards Tasmania.

Rivers are expected to rise throughout the day in areas around Sydney, and are having a major impact on traffic and public transport in western Sydney.

The SES has had about 9000 requests for assistance, and still haven’t been able to attend about 3000 of those. About 30,000 homes in the city and on the Central Coast were left without power.

A combination of the tide, the storm and the direction of the wind meant the beachside homes were the target.

A number of sinkholes have now opened up along the coastline threatening more damage to homes. Emergency crews are on site trying to save the beachfront properties.

Local resident David told the ABC: “There is no beach at Collaroy,” he said.

“I wouldn’t be calling it Collaroy Beach anymore, I’d be calling it Collaroy Point.”

The high tides, fanned by the weekend’s monster storm, have eroded huge swathes of Narrabeen and Collaroy beaches, with some properties losing up to five metres of their properties.

Parts of Beach Club Collaroy also collapsed into the sea as the huge swell smashed the Sydney coastline.

Heavy surf has smashed the Collaroy Surf Club, causing thousands of dollars damage to building & skis @7NewsSydney pic.twitter.com/5t9aZ8sFGI — Ashlee Mullany (@AshleeMullany) June 5, 2016

Coogee’s surf club was also decimated by the storm.

Day breaks on #Collaroy Beach after storm surge Brough 8m waves pic.twitter.com/BC1yZPKRAi — Rachel Pupazzoni (@RachelPupazzoni) June 5, 2016

Narrabeen lakes lower north shore of Sydney 😒😒😒. Wakehurst park way and Narabeen lakes has burst its banks 😳😳😳🤔🤔🤔 pic.twitter.com/9Z25V5NrHe — Emma Jean Caruso (@EmmaJeanCaruso6) June 5, 2016

#Collaroy Beach. It's high tide again here so more waves crashing on this already destroyed beach. pic.twitter.com/H6hiDsoxoV — Rachel Pupazzoni (@RachelPupazzoni) June 5, 2016

One Collaroy resident Matt Kemp posted footage of the carnage, which shows a pool washing into the ocean.

“I also saw power poles, wheelie bins and roofs and heaps of garden furniture washing past,” Mr Kemp wrote on Facebook.

“Pretty crazy. No rain for ages and then whoosh, have a bit of that.”