Capital cities across the country could suffer through sizzling temperatures of more than 40 degrees this week as a heatwave sweeps across Australia's eastern states.

Intense heat has built up over Western Australia, leading to extreme heat in the state, but this is set to move east in the coming days, Weatherzone said.

The hot airmass is expected to hit South Australia and Victoria by Wednesday, bringing top temperatures of 41 degrees to Adelaide and Melbourne.

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It reached the low 40s by 11am in parts of in-land WA today.

Similarly hot temperatures are moving across the country to the east, as far as south-west Queensland.

The Bureau of Meteorology has warned that there will be a three-day period where the extreme heat will hit its peak, between Wednesday and Friday this week.

"We're likely to see extreme heatwave conditions over a huge part of NSW and northern Victoria, practically everywhere between Melbourne and Sydney, and extending well in-land," said meteorologist Dean Narramore.

Weatherzone's Tim Woebbeking said Wednesday will be the warmest day for multiple cities, particularly for Adelaide and Melbourne.

"While Wednesday stands out as the hottest day of the week for both Adelaide and Melbourne, there is a chance that Adelaide could reach 40 degrees again on Thursday with the hot air mass expected to linger over SA's south," Woebbeking said.

The hot weather will reach Melbourne on Thursday and Friday, with maximum temperatures of 30 degrees and 35 degrees respectively.

Thursday could bring some relief for coastal areas within 10 to 20 kilometres of the ocean due to a southerly wind.

However it is expected to remain a sweltering day across in-land SA, NSW and Victoria.

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It will be even hotter in Adelaide, with Thursday peaking at 39 degrees, while Friday is forecast to reach 38 degrees.

The hot air will make its way to New South Wales later in the week, with Sydney not escaping the heat.

Although the harbour city won't see temperatures hit 40 degrees, there will be four days of heat beginning on Wednesday, with the mercury peaking on Saturday at 36 degrees.

However, showers on Sunday will drop temperatures below 30 degrees, with up to five millimetres of rainfall expected.

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Company apologises and admits it could have communicated more clearly.

A light aircraft has crashed at an airport in the Adelaide's north.

The pilot and sole occupant walked away from the crash uninjured.

The aircraft was seen coming in to land at Parafield Airport just after midday.

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The plane caught fire on impact and flames also spread to nearby grass.

The fire is now under control.

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A man and a woman were found dead in separate locations at the rural address.

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She has shared a video online of the pair spending time together.

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A Queensland boilermaker is celebrating after claiming the second biggest Keno win in history with a $8.8 million prize.

The Gladstone man discovered his Keno Mega Milions 10 spot jackpot win after the winning numbers were drawn last night.

"I actually didn't see my numbers come up, but one of the barmen whisked me away," he said.

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"I thought 'What is going on here?'.

"Once I realised, I'd won, I couldn't even speak, I was just gobsmacked."

The man said he planned to upgrade his house, purchase a boat for fishing and set up his family.

"I'll be making sure my kids are right for the rest of their lives, and of course, I'll be helping family," he said.

"What a way to start the year."

The winning entry was purchased at The Queens Hotel in Gladstone.

There are many different ways to get help and information about gambling. You can visit the National Gambling Helpline or call on 1800 858 858.

Australian comedy trio Sooshi Mango has revealed their Melbourne office was broken into overnight, posting CCTV footage of the intruder in a bid to find him.

The group, known for their comedy skits paying homage to their Italian heritage, said an office near their Carlton restaurant Johnny, Vince and Sam's Ristorante, was broken into around 7pm.

CCTV vision posted to the Sooshi Mango Instagram page shows a man wearing jeans and a cream coloured jumper using his body to force open the door to the office.

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He then rifled through a series of drawers before fleeing empty-handed.

"He didn't end up stealing anything because he couldn't find anything of value," the comedy troupe said in a post to Instagram.

"We are Italians, we don't leave our cash in obvious places," they joked.

The group, made up of brothers Carlo and Joe Salantri along with close friend Andrew Manfre, warned the would-be thief "tried to rob the wrong place" after airing the footage to their 3.1 million followers. 

"If we can stop him from taking advantage of just one other honest business then we have done our job," they said.

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Crowned last year's Moomba Monarchs, the trio is calling for harsher penalties to deter would-be thieves from fueling a growing crime rate across Victoria.

"Perhaps if Victoria had stricter laws these filthy rotten leaches (sic) wouldn't have the confidence to go around breaking into places in broad daylight," the group wrote.

"With what's going on at the moment, especially all the home invasions and so forth, everyone's feeling a bit unsafe at the moment," Joe said.

"Let's get these laws a little bit stronger so people are scared to do them."

Police confirmed they were investigating a commercial burglary on Drummond Street.

No arrests have been made.

Any witnesses, anyone with vision or information is urged to contact Crime Stoppers on 1800 333 000 or anonymously at www.crimestoppersvic.com.au.

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