Vivid Sydney has been forced to cancel its centrepiece drone show for multiple nights, blaming "technical difficulties" after drones were seen falling out of the sky.

Nearly 90 drones plummeted into the harbour during the early show last night, sparking comments on social media.

A Vivid spokesperson said the 7.30pm Star-Bound show was called off, and the 9.30pm edition was also cancelled along with both shows today and tomorrow to allow for a "full technical and safety review".

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Organisers blamed "unforeseen technical difficulties" for the mishaps in the earlier show.

"Monday's 7.30pm Vivid Sydney 'Star-Bound' drone show was cancelled due to unforeseen technical difficulties at the start of the performance. We apologise for the disappointment and inconvenience caused to attendees," the spokesperson said.

"The specialist operators identified a technical issue and made the decision to safely discontinue the show in line with standard safety protocols.

"Public safety is always the number one priority and a full assessment is now underway with the specialist operators and relevant government agencies advising on next steps."

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SKYMAGIC, the operator leading the drone show, said in a statement that 89 drones landed in the water around Cockle Bay due to "an unforeseen change in the radio frequency (RF) environment occurring after take-off".

"This anomaly caused a number of drones in the fleet to enact failsafe landing procedures in response to compromised positional accuracy."

"The pilot team encountering the issue immediately performed a stop command rendering the fleet stationary in the air, enabling time to safely assess the issue.

"Once stability had been evaluated, the team then activated the return to home protocol bringing the unaffected drones to a safe landing," SKYMAGIC said in a statement.

The festival, which kicked off on Sunday night, showcases light installations, music performances, food and other experiences.

This year is a comeback for the drone show, which proved so wildly popular in 2024 that it was cancelled last year due to safety concerns. There was also criticism from some attendees that the show was underwhelming.

Sunday night's 7.30pm edition of the drone show had to be cancelled due to rain, but the 9.30pm edition went ahead without a hitch.

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A pair of famous chimney stacks, which defined the architecture of Liddell Power Station in the NSW Hunter Valley for 52 years, have now been reduced to rubble.

Energy giant AGL orchestrated a controlled demolition of the pair of 168-metre chimneys as the site undergoes a major demolition and redevelopment.

AGL hosted a livestream of the demolition and hundreds of people watched in real-time as the structures crumbled to the ground after explosives were detonated at the base.

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The chimneys came crashing down a little after 11am today.

The rest of the station will be demolished following the twin chimney blast.

The New England Highway was closed temporarily ahead of the detonation.

Liddell Power Station was opened near Muswellbrook in 1971.

The coal-fired power station was then decommissioned in April 2023 after 52 years and early demolition began in early 2024.

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Over the past 18 months, the site has been slowly cleaned out and disconnected.

"The demolition of the Liddell Power Station is a large and complex project that will be executed by a specialist team following years of planning," AGL said.

The site will be redeveloped by AGL into a new industrial energy hub, which will include a 500 MW grid-scale battery.

Over half of the employees at the Liddell site were transfered to AGL's Bayswater location, while the remaining staff have either left the company or transitioned into retirement.

Liddell electrical tradesperson Jackson Channon said Liddell's demolition has been "bittersweet" for his colleagues and family.

"My grandfather drove one of the trucks when they were building Liddell, and my parents worked here – this place has meant a lot to my family, and for the people who work here, it's like a community of mates," he said.

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Millions of Australians will feel some welcome relief with power bills to drop in the second half of the year.

The Australian Energy Regulator has handed down its final default market offer for south-east Queensland, NSW, and South Australia.

Residential addresses will see prices fall in NSW (by 3.4 to 5 per cent) and south-east Queensland (by 7.2 per cent), while South Australia is bucking the trend with a 1.4 per cent increase.

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That's an average of $66 to $137 off the bill for NSW residents, and a $155 drop for Queensland, alongside a $33 increase for South Australia.

But small businesses in all three zones will enjoy a discount, of 9 to 11.3 per cent ($432 to $705) in NSW, 10.4 per cent in south-east Queensland ($445), and 6.8 per cent ($379) in South Australia.

The bill relief will kick in from July 1 this year.

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Victoria also received welcome news yesterday, with flat rate plans to drop by 3 to 8 eight per cent, saving a typical household between $50 and $160 a year.

The average saving is estimated to be a five per cent drop, or $84.

But experts have reminded consumers that default offers are a "safeguard price" for consumers who choose to not shop around, and there may still be cheaper options out there.

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"I would urge electricity customers to use today's news to shop around for a better energy deal," iSelect comparison expert Sophie Ryan said.

Sophie said a failure to shop around for the best deal could be "costing Aussies dearly" and said consumers should review their plan.

"New prices take effect 1 July 2026, coinciding with the introduction of a new Solar Sharer Offer, giving smart meter households three hours of free electricity in the middle of the day – an opt-in opportunity to cut bills further by shifting usage like washing machines, EV charging or air conditioning to off-peak solar hours," she said.

Canstar found that the bill relief was driven partially by a fall in energy wholesale costs, despite the ongoing global fuel crisis.

It also costs less to deliver power to people's homes, and environmental costs have nearly halved.