A storm has pummelled Western Australia, sending trampolines and sheds flying and causing flash flooding and power cuts.

And the Bureau of Meteorology warns the weather is set to turn even worse.

In Mandurah, south of Perth, a neighbour's shed was sent crashing into a family's backyard pool.

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"It came over that side, over the fence, and then the next thing we know we got a free home," the owner said.

Down the road, Dawn Crawford was holding on, battling the wind to stop her fence from giving way.

"I was here holding this for an hour," she said.

Flash flooding forced Perth locals to get creative for a morning coffee.

"We've had jellyfish, we've had ducks, and then we've had our regulars, which is great," joked Rob Strahan from Bayswater Oarhouse.

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High swells in Hillarys became a playground for surfers.

Some boats sank as the Swan River spilled over its banks.

SES crews were kept busy responding to more than 380 calls for help since 5pm on Saturday.

Power lines came down across multiple suburbs, with more than 28,000 Western Power customers without power.

"I was in bed and the kids come running in and screaming the power's out so wasn't too happy. Wanted to be able to watch the footy this afternoon," Beaconsfield man Steve Tonge said.

A tree smashed a roof narrowly missing Brad Counsel and his dog.

"Gust of wind and then down came the tree," he said.

The storm has already dumped more than 57.4 millimetres of rain in Capel, between Bunbury and Busselton, in the past 24 hours.

Cape Leeuwin, the most south-westerly point of the mainland, recorded wind gusts of 122km/h.

Emergency crews called for everyone in the state's south-east to tie down loose items before the full force hit.

Joey Rawson from the Bureau of Meteorology said the wild weather would be unusual.

"As we progress into the evening this low pressure system really intensifies and it's going to bring conditions that we don't see that often in south-west WA."

Earlier forecasts even predicted the risk of tornadoes.

The wild weather could also hit other states this week.

An Australian tourist is being questioned by Vietnamese police after allegedly going on a rampage in a busy cafe.

He's accused of causing thousands of dollars of damage in the city of Da Nang before being marched away by police in his underwear.

Footage from the early-morning spree appears to show the Australian man get up from his chair and smash a phone another customer was using to help translate for him.

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Staff say he proclaimed "you have ten seconds to leave".

In the video, a man appears to use a chair as a battering ram taking aim at the front counter and the coffee machine before the front windows.

He rifles through the bags of customers who'd made a quick exit, turning a laptop into two frisbees.

A group watched in horror from the second floor as the man headed for them next.

He kicked the door open before putting one man in a headlock.

Police officers begin to assemble outside before rushing in and arresting him.

READ MORE: Wild weather smashing WA could hit rest of Australia this week

The cafe was forced to shut for up to three days.

Owners are seeking compensation for a damage bill reportedly as high as $26,000

The man remains in temporary detention for questioning

It's been almost five years since Brisbane locked in Olympic hosting rights, and tomorrow construction on the centrepiece stadium will finally begin.

Victoria Park will be closed to the public.

But desperate protesters haven't gone down without a fight, swarming the site in a last-ditch effort to block the build.

READ MORE: Wild weather smashing WA could hit rest of Australia this week

Hundreds lined Herston Road in an eleventh-hour bid to keep hands off the site that will be home to the Brisbane Olympic Stadium.

Campaigners said they were "appealed" and "outraged".

"I'm prepared to fight for it until its saved," one person pledged.

"I think it's a tragedy that its going to be bulldozed and concreted over," another said.

On Friday two protesters were arrested.

At midnight on Sunday Victoria Park, will close to the public.

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Heavy machinery has been moved in and fences have already gone up, sparking violent clashes on Friday between police and traditional owners who had set up camp.

"This is our land, always was, always will be," Aboriginal Elder Theresa Williams said.

Today officers watched from afar and overnight it was expected the tents would come down.

"The reality is it's a construction site and no one's going to be able to be on the construction site, so they're gonna have to be moved on," Deputy Premier Jarrod Bleijie said.

Former premier Campbell Newman said: "We're about to lose something precious due to an act of barbarism."

Tomorrow, the land will no longer be owned by the council but the Olympic Games Delivery Authority.

Nine News has obtained exclusive mapping revealing which parts of the park will be shut down and where access will remain.

Fencing will close off the green space surrounded by the Inner Northern Busway, and Gilchrist Avenue including a section that borders the ICB.

The central footpath and bikeway will remain open while building is under way, as will the site of the future aquatic centre where Centenary Pool currently sits and the urban pump track.

But there will be no pedestrian access from the QUT or Herston Bus Stations.

It's the end for the Victoria Park Golf Complex, with locals turning out to say farewell to the driving range, putt putt course, and bistro.

But the premier maintains this is generational infrastructure in the making.

"It'll be there for concerts, it'll be there for sport, it'll be there as a green space for people to be able to go and enjoy every single day," David Crisafulli sadi.

Junior footy player Beau Martel will turn the first sod on the building site.

When construction begins it'll mark one of the most significant milestones towards becoming an Olympic city since Brisbane secured the games in 2021 – but protesters say it won't bring an end to their campaign

"We have not given up, it is not a done deal, and we are still fighting, and we need you," Sue Bremner from Save Victoria Park said.

A tradie has relived his road rage nightmare after surviving an axe attack following a minor crash.

Rico Nekelo says he's lucky to be alive but now has to cope with the mental and physical scars from the attack in Melbourne.

He was on his way to see a mate last month but instead came close to death.

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"On the scene I was definitely dying. I was getting cold and yeah, my eyes are starting to shut," he told 9News.

The horror road rage attack unfolded after an erratic driver collided with Nekelo's car in Cranbourne on April 6.

The 21-year-old said he copped an axe to the back, twice.

"I pretty much got out of the car, and he got out at the same time with an axe and Yeah, I just started running," he said.

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His injuries were so severe his surgeon said he was lucky to be alive.

His sister Charlotte Vemoa said it was a "very violent attack for something that was very minor".

While Rekelo's out of hospital, he's still carrying the scars of the nightmare ordeal.

"I would say it's, it's been very hard as an older sibling to watch," Vemoa said.

His mother, Mate Carnahan, said it had been mentally hard for loved ones, who felt helpless and were desperate for support.

"So the victim assistance program. I've been trying to reach out to them since the hospital, so maybe five weeks now," Nekelo said.

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His mother said the government was failing victims.

"He didn't ask this to happen to him. They're failing," she said.

His alleged attacker was arrested at the scene but arrested pending further inquiries.

Meanwhile, Nekelo will be unable to work for months.

"It's an everyday struggle," he said.

The collision happened on a rural stretch between Tukairangi and Oruanui Rds in Wairakei

A Sydney man will face court this week, accused of stalking the potential future queen of Norway while she studies here in Australia.

It's been reported a suspicious letter was sent to Norwegian Princess Ingrid ­Alexandra.

It was intercepted by her security detail at St Andrew's College at Sydney University.

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A 63-year-old Glebe man has now been issued with an AVO and will front court on Wednesday.

The 22-year-old royal, who is second in line to the Norwegian throne, has kept a reasonably low profile since moving to Australia to study arts and international relations last year.

Now, her future at the university is being reassessed.

In a massive political disruption, new polling has pegged One Nation as the most popular party in the country, leapfrogging Labor in primary support.

The latest The Australian Financial Review/Redbridge Group/Accent Research poll revealed primary support for One Nation had jumped four percentage points to 31 per cent since the pre-budget poll a month ago.

Meanwhile, Labor's primary vote fell three points to 28 per cent and the Coalition dipped further to 20 per cent.

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READ MORE: Wild weather smashing WA could hit rest of Australia this week

Labor leads One Nation on a two-party-preferred basis but the gap has narrowed from 10 points to just 51-49.

Redbridge director Tony Barry told the AFR that a record 63 per cent of those polled believed the country was heading in the wrong direction, helping to explain the One Nation surge.

"The downstream effects of the budget and another interest rate rise is Labor have lost more vote share, but the Coalition aren't the beneficiaries on a primary vote basis," he said.

"With almost two-thirds of the electorate now saying Australia is heading in the wrong direction, that pervasive negative mood sentiment is fuelling more anti-establishment support and a view among a growing cohort of voters that the answer lies outside established norms and major parties."

9News political editor Charles Croucher stressed polls didn't directly translate into votes but One Nation could win seats if the trend continued.

If it won enough seats, the prospect of a two- or three-party Coalition could emerge.

One Nation Leader Pauline Hanson says she believes she can take the top job.

"I believe that I have the ability to do it. I'm not going to underestimate myself," she said.

Shake-up to AUKUS announced

The polling was released on the same day the government announced a major shake-up in the multibillion-dollar AUKUS deal, with Australia set to switch to used American nuclear submarines.

Defence Minister Richard Marles was in Singapore with his American and British counterparts, who agreed to greater collaboration on underwater drones and weaponry for autonomous subs and a change for the AUKUS agreement.

Australia will receive three used Virginia-class nuclear-powered submarines from America, not the mix of new and used boats as first planned.

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"This signature project will see our countries operating at the highest level," Marles said.

"In the context of a very complicated endeavour, we need to place a premium on simplicity." 

Defence officials say this will make servicing and operations easier and significantly cheaper.

But Greens senator David Shoebridge was sceptical.

"Mr Marles went to Singapore to meet with his AUKUS buddies and he came back with a handful of second hand subs on a promise from the United States," he said.

China's leadership didn't attend this year's Shangri-La Dialogue but with wars still ravaging the Middle East and Ukraine the middle powers are praising the recent summit in Beijing, desperate to avoid regional wars becoming a world war.

"When great powers are talking with each other, the world feels safer. So we very much welcome that gathering," Marles said.

The AUKUS deal will be part of Australia's defence strategy for decades to come, forcing it to survive changes at the White House, Downing Street and in Canberra.

Travellers are urged to leave early to avoid heavy rain across key routes.

The man was found clinging to a seat cushion in 10C water.

Police were called to reports of shots being fired in Sydney's south-west.

Officers set up a perimeter around the home in Burley Road, Horsley Park.

They were told shots were fired just before before 2pm.

READ MORE: Wild weather smashing WA could hit rest of Australia this week

APolAir helicopter, Public Order and Riot Squad, Dog Unit, Tactical Operations Unit (TOU) were also summoned.

Two vehicles were stopped near the property and police spoke to seven people, with occupants made to lie on the floor by armed police.

A 47-year-old man was arrested at a house on the property and is assisting police.

Nobody was hurt.