"The Katherine River experienced its most significant flooding in decades, surpassing the major flood level of 17.5 meters and marking its highest level since 1998."

Australia Battered by Successive Flood Events and Cyclone Threat

A series of tropical low-pressure systems has caused extensive flooding, evacuations, and infrastructure damage across northern Australia, while a separate weather system brought record rainfall to central and southern parts of the country. The Bureau of Meteorology (BOM) has issued multiple severe weather warnings, flood watches, and cyclone alerts for various regions.

Northern Territory Flooding

Katherine and the Big Rivers Region

The Katherine River experienced its most significant flooding in decades. The river peaked at 19.2 meters on March 7, surpassing the major flood level of 17.5 meters and marking its highest level since 1998.

The floodwaters inundated homes and businesses, breached the town's levee system, and forced the evacuation of Katherine Hospital. A temporary field hospital was established in Katherine East by the National Critical Care and Trauma Response Centre to ensure continued medical support.

Hundreds of residents were housed in emergency shelters, with over 800 individuals remaining in evacuation centers across the NT at the peak of the event. Power outages affected thousands of homes, and sewerage infrastructure sustained damage. The Katherine River initially receded but was forecast to rise again as ex-Tropical Cyclone Narelle approached the region.

Daly River / Nauiyu

The Daly River underwent a prolonged major flood event, reaching a record 16.38 meters. This level surpassed the 1998 peak. All residents of Nauiyu/Daly River were evacuated to Darwin for the second time this year due to flooding. The community remained submerged for an extended period, with all buildings reported to be underwater, many up to their roofs.

Remote Community Evacuations

Multiple remote communities in the Top End were evacuated due to rising floodwaters:

• Palumpa / Nganmarriyanga: Residents were evacuated to Darwin.
• Jilkminggan: Residents were evacuated to Mataranka.
• Beswick / Wugularr: Residents sheltered on higher ground or relocated to Mataranka as the Waterhouse River remained near major flood levels.

Darwin River and Greater Darwin Area

The Darwin River Dam reached over 110% capacity, leading to "substantial flooding" of its pump station and equipment, which took Darwin's primary drinking water supply offline. This prompted Level 4 water restrictions for Cairns (a separate but concurrent event) and a two-day boil water alert for Greater Darwin. Flash flooding affected homes in Darwin River, with some residents reporting no prior warning before their properties were inundated.

State and Federal Response

The Northern Territory government requested assistance from the Australian Defence Force (ADF) for the recovery phase. Disaster assistance payments were activated for affected residents, including immediate relief payments (up to $611 per adult and $309 per child, capped at $1,537 per family) and re-establishment assistance (up to $8,843 per household). Over $1.5 million in flood assistance payments were issued.

"Over $1.5 million in flood assistance payments were issued."

Queensland Flooding

Far North Queensland

A tropical low (designated 29U) made landfall near Innisfail, delivering significant rainfall across the region. The Daintree area received 300-400mm of rain in 24 hours. The Daintree River swelled to 13 meters, causing the local ferry to break its moorings and collide with another vessel. The ferry was subsequently inoperable, though local river cruise boats provided pedestrian access to northern Daintree communities.

Business owner David White lost two boats used for crocodile and wildlife tours; one was found overturned, the other was missing. A community fundraiser quickly raised $50,000.

Central and Western Queensland

The Thomson River at Longreach reached a major flood level, peaking at 6.16 meters. The Landsborough Highway to Winton was cut off. Major flood warnings were issued for the Flinders River at Richmond and Walker's Bend, and the Western River at Winton.

Agricultural losses were significant. Estimates indicated over 16,000-24,000 head of livestock were lost or missing across northern Queensland. Hundreds of kilometers of fencing, roads, and essential equipment were damaged. A $38 million aid package for flood-affected communities in North West Queensland was announced by the Prime Minister.

Southeast Queensland

A severe weather warning was active for the Sunshine Coast, Wide Bay-Burnett region, parts of the Darling Downs, and southern Central Highlands. Rainfall totals included 396mm at Boondooma and 279mm at Bundaberg South over several days. Residents of Bundaberg received evacuation orders due to major flooding from the swollen Burnett River, which was expected to exceed 7 meters.

Ex-Tropical Cyclone Narelle

A tropical low in the Coral Sea, initially designated Tropical Low 34U, intensified into Tropical Cyclone Narelle. The system:

• Was forecast to reach Category 4 intensity before making landfall.
• A cyclone watch was issued from Port Douglas to Lockhart River.
• Forecasted damaging wind gusts up to 120 km/h, with destructive gusts up to 155 km/h and very destructive gusts potentially reaching 200 km/h near the cyclone's eye.
• The system was forecast to bring 200-300mm of rainfall to already saturated areas.

Narelle crossed the Queensland coast between Ayr and Bowen as a Category 2 cyclone, later weakening to a Category 1 before making landfall. It then tracked inland, delivering heavy rainfall across northern Queensland, and ultimately moved into the Northern Territory. After exiting the NT, the system, now downgraded to a tropical low, moved over the Western Australian border.

Widespread Inland and Southern Rainfall

A rare, slow-moving tropical low-pressure system over central Australia brought record-breaking rainfall to many arid regions:

• South Australia recorded its second wettest February.
• The Northern Territory experienced its third wettest February on record.
• Much of central Australia received 100-200mm of rain, with some isolated areas approaching 300mm.

Kati Thanda-Lake Eyre

Kati Thanda-Lake Eyre, Australia's largest inland lake, was expected to reach full capacity for the first time in 50 years. The lake was reported to have a water depth of 1.9 meters at Belt Bay and was continuing to rise. Experts stated this year's inflow could be one of the largest ever observed, with water expected to continue flowing for months.

Agricultural Impacts

The extensive rainfall brought mixed outcomes. While it provided drought relief for some farming regions, including potential for earlier seeding and maintaining cattle herd sizes, the timing and volume were detrimental for many grape growers. Growers in the Murray, Darling, and Swan Hill regions reported 100-180mm of rain within five days, leading to concerns about crop losses due to berry splitting and bunch rot.

Easter Weekend Forecast and Subsequent Cyclone Threat

The BOM forecasted mostly settled weather for the Easter long weekend across most of Australia, with a high-pressure system bringing stable conditions. However, a new tropical low (designated 37U) was identified between Papua New Guinea and the Solomon Islands, with a high probability of developing into a cyclone (to be named Owen if formed in Australian waters) over the northern Coral Sea. The system was projected to move towards the Australian coast from mid-next week, though its exact path remains uncertain.

Public Safety and Infrastructure

Authorities issued consistent warnings for residents to avoid floodwaters due to strong currents, debris, and increased crocodile activity. Reports of crocodile sightings in flood-affected areas, including on residential streets in Katherine, were documented. Multiple major transport routes, including sections of the Stuart Highway, were closed due to flooding. The East West rail line in South Australia was closed due to "track washaways" of up to 100 meters.