Residents of Northern Queensland are bracing for significant flooding as forecasts predict up to 300mm of rain over the coming days.

Widespread rainfall has already been reported across northern and central Queensland, with some areas experiencing between 50mm and 150mm overnight.

Particularly hard-hit locations like Ayr and Tully have already seen severe flooding, with rainfall totals expected to reach between 100mm and 200mm.

The Bureau of Meteorology's senior meteorologist, Dean Narramore, has warned that more rain is anticipated despite the already heavy downpours.

Major flood warnings are currently in effect for the Cape River, Herbert River, and Murray River, with moderate and minor warnings issued for several other rivers in the area.

The recent flooding has tragically resulted in the deaths of two women, prompting ongoing cleanup efforts in Townsville, Ingham, and Mackay.

In response to the disaster, Prime Minister Anthony Albanese has announced an additional $8 million in relief funding to assist flood-affected communities with cleanup and restoration.

Eligible residents in Cardwell, Giru, and Hinchinbrook can apply for financial assistance through myGov, receiving $1,000 per adult and $400 per child.

Additionally, the Queensland government is providing disaster assistance loans of up to $250,000 for eligible primary producers impacted by the flooding.

Rainfall is also anticipated in the Northern Territory, where parts of the Kimberley and northern Top End have recorded between 20 to 50mm, along with continued thunderstorm activity.

In Townsville and Mackay, isolated rainfall totals between 50mm and 150mm are expected, with the possibility of even higher amounts in certain areas.