2022 eastern Australia floods

The flooding was the result of a low pressure system over Queensland's southern coast that dragged in moisture from the Coral Sea in the north, raising it over the Queensland coastline. The area of colder air higher in the atmosphere which the low-pressure system travelled in, thus making the atmosphere unstable and permitting moisture to be lifted up and falling as rain. As the system headed south, it turned into an East Coast Low near the Central Coast and Sydney. Furthermore, around New Zealand, there existed an area of high pressure, which is an anti-clockwise rotating blocking high that obstructed the low pressure system from drifting away into the Tasman Sea.[19]

Rowing shed in West End, Brisbane

Brisbane River and Story Bridge in flood

Flooding in Corinda

The Brisbane central business district (CBD) experienced flooding, as well as the inner city areas of South Bank and South Brisbane, Milton, West End, Windsor, Lutwyche, Gordon Park, Grange, Wooloowin, Toombul and Newstead. On 28 February the Brisbane River's height reached 3.8 metres (12 ft), higher than the 2.3-metre (7 ft 7 in) peak height of flooding in 2013 but below the 3.9 metres recorded during the 2010–2011 Queensland floods[20] and less than the peak height of 4.46m in 2011.[21] The Kedron Brook Floodway broke its weir at multiple points inundating houses in the surrounding suburbs and flooding the popular and iconic Toombul Shopping Centre, which shut permanently as a result of the subsequent flood damage. Substantial infrastructure damage was caused to the Kedron Brook Floodway attributable to the 1000mm of rain that fell in its catchment over the 72 hour period of the floods. In Brisbane 177 suburbs were impacted with more than 23,000 homes inundated. [22]

Throughout South-East Queensland, more than 20,000 homes were inundated and power outages affected over 51,000 properties.[23][24] All public transport services were shut down lasting for several days, including rail, buses, and City Cat ferries. South-East Queensland's rail network suffered extensive damage resulting from landslips, and major highways closed due to flooding, including the Bruce Highway, the Warrego Highway and the Ipswich Motorway.[25]

Holman Street ferry wharf in the Brisbane River suffered damage by floating debris.[26] On the 28 February, a river crane for the Kangaroo Point Bridge broke free of its mooring, causing the evacuation of apartment and office buildings along Eagle Street and the area of Howard Smith Wharves.[27][28] Wivenhoe Dam peaked at 183.9% capacity that day, despite the outflow gates being opened, albeit not at 100%.[29] Enoggera Dam, in the western Brisbane suburb of The Gap, reached a record capacity of 270% on the same day.[30]

Wivenhoe Dam is primarily designed for drinking water supply to Brisbane, Ipswich, and surrounding areas, as well as flood protection for Brisbane. The 2022 floods would have been significantly worse if it were not for Wivenhoe Dam, with the dam also being ~56% full prior to the huge inflow.[31] Over the course of the rain event (excluding subsequent inflows after the rain had stopped), Wivenhoe had inflows of 2.2 million mega litres (ML), and released only 150,000 ML, effectively holding back 2.05 million ML from flowing down the Brisbane River and decimating Greater Brisbane.[32]

In the Wide Bay–Burnett, the city of Gympie suffered its worst flooding since 1893, with the Mary river peaking at 22.96 metres on 28 February.[33] About 550 people sought shelter at the Gympie evacuation shelter, and up to 3600 homes were inundated in the city.[34] The city of Maryborough also suffered flooding in parts of its CBD and cut bridges, an 11-metre flood levee was erected to protect the rest of the city centre.[35]

On the morning of 28 March, Emergency Services were called to a submerged vehicle in Toowoomba where a man and several dogs had drowned due to the flooding.[36]

On 29 March, heavy rainfall caused flood levels to peak at 3.6 metres in Dalby, swamping homes and businesses, with many residents considering to resettle elsewhere after four floods in five months destroyed their homes.[37]

In early March, in the Northern Rivers, the M1 highway was closed by flooding from Cudgera Creek to Tweed Heads.[38] The area, particularly Woodburn, Lismore and Clarence Valley Council, suffering fuel, food and water shortages. 400 military personnel were sent to Lismore to help with the clean-up. Four people perished in Lismore, after the area suffered its worst flood in recorded history, inundating many businesses and homes in the city, which peaked 2 metres above the town's last record flood.[39] More than 3,000 homes in Lismore were affected by the flood, which left the region to resemble "a war zone". There were around 270 people refuging in Lismore's two evacuation centres, with thousands of others finding shelter in family and friends' places of residence.[40] Community groups also stepped in to fill gaps in the state and federal governments' response, helping to clear and clean flood damaged houses while providing food and shelter.[41]

On 30 March, Byron Bay's main street (Jonson Street) was partially submerged in floodwaters following another wave of sousing rain in northern NSW. A residential estate in Ballina was also submerged, flooding homes.[42]

On 30 March, after the all-clear had been given in Lismore less than 24 hours prior, an evacuation order was again issued for those in low-lying areas of the city as the levee overflowed as the Wilsons River began to rise (expected to peak at 12 metres) and the city centre flooded, in addition to a woman going missing in floodwaters south of Lismore.[43] The heavy rainfall and flash flooding evoked more than 60 flood rescues in the 24 hours leading up to the 30th, in addition to some locals being isolated due to surrounding floodwaters. The Pacific Highway was closed in both directions between Wardell and Tintenbar due to the flooding.[44]

On 3 March, thousands of people in Camden, Chipping Norton, Georges Hall, Lansvale, Milperra, Moorebank, Warwick Farm, North Richmond, Windsor, and nearby suburbs were told to evacuate as the Hawkesbury River, Nepean River and Georges rivers began to rise after 100 mm (3.94 in) of rain fell over parts of Western Sydney overnight.[45][46] Warragamba Dam, Sydney's chief reservoir, was spilling at a rate in excess of 70 gigalitres a day on 3 March.[45]

On 8 March, another heavy deluge inundated streets in Lansvale, Bass Hill, Bankstown, Liverpool and Wisemans Ferry, in addition to two people being found dead in a storm canal at Wentworthville. Areas near the Georges River and Manly Dam were placed under an evacuation order by the State Emergency Service as floodwaters began to rise that day, with 2000 people evacuating in Manly.[47] Floodwaters in this event topped 2021's levels, with playgrounds and caravan parks being submerged, particularly in Freshwater, Brookvale, Manly, Curl Curl and the encompassing suburbs.[48][49] In the Upper North Shore, the Roseville Bridge was flooded, in addition to a portion of a ceiling at Bondi Junction Westfield collapsing.[50]

On 7 April, the floods forced Picton, New South Wales to be placed under an evacuation warning as the Stonequarry Creek continued to rise. Camden, New South Wales was inundated as the floodwaters rose.[51]

On 2 July, Camden, New South Wales was ordered to evacuate for the fourth time of the year due more major flooding.[52]

Damage from floods was expected to reach almost A$1.5 billion, as addition ADF troops came to aid in clean-up efforts. Insurance Council of Australia figures calculated the cost of claims from the disaster was A$1.45 billion as of 7 March, but it was expected to rise once the extent of the damage is known. According to the council, insurers had received more than 96,000 claims, with 80 per cent of those for homes, thus far. Of those, 69% of claims had come from Queensland, with 31% from NSW. There had been as many as 5000 ADF personnel distributed across the flood disaster areas by 5 March. Despite the aid efforts, there was rising criticism from those impacted by the floods that the government was too slow to act in sending in defence troops to help them. As of 8 March, more than $282 million in disaster payments to flood victims were paid to 242,000 people ($157 million to victims in NSW and $125 million to those in Queensland). The LGAs affected would gain from the next stage of support for the victims, which included $256 million for emergency relief, food relief and financial counselling services.[61]

Seven Network, Nine Network and Network 10 united in partnership with Red Cross Australia for the telethon event on the evening of 12 March to raise money for those affected by the floods. The event featured popular Australian musicians who performed to raise money, such as, Tones and I, Jimmy Barnes, Delta Goodrem, Jon Stevens, Vanessa Amorosi, Hunters and Collectors, The Living End, Casey Donovan and Sheppard. The hosts included Seven's Natalie Barr, David Koch, Sonia Kruger and Mark Ferguson; Nine's Scott Cam, Sylvia Jeffreys, Andy Lee and Peter Overton; and 10's Carrie Bickmore, Dr. Chris Brown, Amanda Keller and Osher Günsberg. Proceeds from the telethon were donated to the Australian Red Cross, which provided support to those ravaged by the floods, and this will include evacuation support, staffing of relief centres and outreach services, in addition to helping people and communities recuperate and rebuild.[62]