Westpac Rescue attend multiple rescues in Lismore, Wilsons Creek, Gundurimba

Countless rescues have taken place as emergency services are inundated by the Northern NSW flooding tragedy, including a man suffering injuries from a landslide.

Countless rescues have taken place as emergency services turn their efforts to measuring the scope of the Northern NSW flooding tragedy.

NSW Police estimate about 3000 people have been rescued in Lismore by members of the Australian Defence Force, Fire and Rescue NSW, SES, Surf Life Savers and the community.

Westpac Rescue Helicopter responded to an elderly couple trapped on their property south of Lismore about 8.15pm on Monday.

The team were able to land at Gundurimba to assist the couple isolated by floodwaters on their property with both requiring medical assistance

The Helicopter Critical Care Medical Team checked both patients over before they were airlifted to Ballina Airport. They were then taken by road ambulance to hospital in a stable condition.

The Westpac Rescue Helicopter team helped a man in his 30s from a landslide in Wilsons Creek on Tuesday about 3pm.

The man suffered serious injuries including fractures.

He was stabilised then airlifted to the Gold Coast University Hospital for further treatment.

Police drive through flooding on Fox Street, Ballina near Ballina Fair Shopping Centre on Tuesday morning, March 1, 2022. Picture: Liana Boss

Meanwhile, terrifying scenes have unfolded in flood-ravaged Lismore where a rescue by an Army helicopter of a person on a rooftop had to be abandoned.

During a live cross on national television, a rescuer could be seen working carefully to secure one of at least two people waiting on a rooftop of a house surrounded by an island of water.

The rescuer is seen taking some time to carefully secure the person as the downdraft from the helicopter creates cyclonic-like wind.

A palm tree in front of the house can be seen blowing back and forth.

As the Army chopper prepares to winch the person off the roof, the winch line became entangled in what appeared to be a television antenna as the rescuer motioned for the chopper to be moved away.

Efforts to free the line were unsuccessful so the person had to be lowered back onto the roof.

A short time later the person was able to be lifted off the roof, followed by another.

With rain now easing in the area, Army and rescue helicopters are going from rooftop to rooftop to save people who have been stuck since Monday.