The body of a woman has been found on a flooded property in northern NSW, police have confirmed.
The woman disappeared in floodwaters overnight from a rural property about 20km south of Murwillumbah.
Her body was discovered by a family member about 8am today, according to a statement released by NSW Police.
The fatality comes after tens of thousands of people were evacuated from towns across NSW and Queensland due to severe flooding caused by Tropical Cyclone Debbie.
The category four storm hit northeastern Australia on Tuesday between Bowen and Airlie Beach, ripping up trees, washing boats onto land and causing widespread damage.
Debbie was downgraded to a tropical low as it tracked southeast, but continued to pack damaging gusts and dump huge amounts of rain down the eastern coast to NSW.
The federal and state governments have announced that natural disaster assistance will be made available to residents in Ballina, Byron, Kyogle, Lismore, Richmond Valley and Tweed regions.
"We are committed to ensuring those impacted by flooding have the support they need to recover and rebuild and will extend assistance to other areas if required," the NSW Emergency Services Minister Troy Grant said.
Lismore has been hit hard, with the State Emergency Service (SES) warning there may have been fatalities caused by the flooding.
The city's siren was activated on Thursday night to warn residents to leave immediately.
"It's the first time it's been activated in 12 years," Lismore mayor Isaac Smith told AAP.
