As a catastrophic weather system threatens to spill, isolating populations once more, our states are in the crosshairs of another flood calamity.

Two males have been reported deceased in floodwaters in Victoria and New South Wales in the last 24 hours.

It comes after the corpse of a 71-year-old man was discovered in floodwaters in Victoria on Saturday.

Four states staring down the barrel of floods crisis
Maribyrnong On Flood Alert As River Levels Rise
(Photo : Asanka Ratnayake/Getty Images)

The Bureau of Meteorology has issued a thunderstorm warning for more than half of Queensland, predicting severe gusts, huge hail, and heavy rain for eastern interior Queensland from Bowen to Shoalwater Bay, as per 9News.

Emerald, a town in Queensland's Central Highlands Region, received 145 mm of rain yesterday, making it the wettest October day on record.

After her vehicle became submerged in flooding on the Mackenzie River near the settlement, a woman had to be rescued.

She was hanging to her truck for 90 minutes before being rescued.

According to 9News reporter Mia Glover, the system is huge and is starting to track toward the shore.

The brunt of the storms is expected to hit the southeast tomorrow and into the weekend.

Seqwater is so concerned about this system that it has begun to discharge water from Wivenhoe Dam.

The rain is being fueled by a slow-moving low that has sucked in "huge amounts of tropical moisture after hanging over the country's center," according to Weatherzone.

The weather agency has labeled the system as "very rare."

Outback South Australia, which is often exceedingly dry, had record October rainfall, according to the report.

During the previous 24-36 hours, a cut-off low crossing across South Australia generated steady rain and thunderstorms, with rainfall exceeding some of last week's measurements in flood-affected areas of Victoria.

Woomera had 74.4 mm of rain in 24 hours, making it the wettest October day on record. The remote community's October monthly average is only 15.3 mm.

Victoria is also suffering record floods, with several rivers in the state's north facing their worst flooding in decades.

There are 49 flood warnings in force in Victoria as of 6 a.m.

Barmah, Barmah East, lower Moira, Echuca, and Echuca Village are all under evacuation orders.

Residents in the Victorian town of Echuca are divided, with the town's hopes depending on a handmade levee that has divided the village.

These residents are experiencing extreme anxiety. Today reporter Izabella Staskowski described the situation as a "creeping deluge."

They can see it approaching their houses; some people tell me they have watched the Murray River approaching for days and are just waiting for it to hit.

Read more: Australia: Bureau of Meteorology Issues Storm Warnings and Flood Warnings for Lismore This Week

Australia floods crisis set to worsen

Thousands of people in southeast Australia braced for further flooding on Tuesday, as weather experts predicted additional rain later this week, and swelling rivers continued to flood farms, towns, and homes, as per Reuters.

The Murray River, which runs through Australia's two most populous states of New South Wales and Victoria, might reach a near 30-year high on Friday at the border towns of Echuca and Moama, which are home to more than 20,000 people, according to the Bureau of Meteorology's latest report.

Emergency personnel increased the supply of sandbags and built up rescue centers in Moama, some 200 kilometers (120 miles) north of Melbourne, to help shelter hundreds of displaced people.

Several thousand additional people in northern Victoria and southern New South Wales have been urged to evacuate.

Even though the extreme weather has subsided, significant flood warnings remain in effect throughout large areas of the southeast after the region got more than a month's total rainfall in two days last week.

More rain is anticipated to fall in some flood-affected areas beginning late Wednesday, with a low-pressure system dropping up to 50 mm (2 inches) of rain.

Federal Treasurer Jim Chalmers has warned that floods in growing regions might raise food costs and has proposed more relief expenditure ahead of next week's budget.

Noumi, a plant- and dairy-based beverage company with a factory near the flooded town of Shepparton, has indicated that operations are functioning at reduced capacity following media allegations that dairy farmers were dumping milk after fields were cut off by rising water.

Related article: Australia Flooding Inundates Hundreds of Homes, Forces Evacuation Orders, and Causes Power Outages