No bodies have been found in a mass of cars washed under a Queensland town's rail bridge where authorities feared they would find several people dead.

Experts blame a combination of a La Nina weather pattern and global warming for the magnitude of the Queensland flood disaster.

NZ's Civil Defence team was back on the move in flood-ravaged Queensland today after spending a frustrating day off confined to one of the state's isolated communities.

Flooding has left a valley to the west of Brisbane looking like a war zone, with Australian troops steeling themselves for expected ‘terrible outcomes’ as they move into the devastated area.

The frightening power of the brown surge heading towards Moreton Bay leaves no mistake about the devastation that this flood has done.

Australia's Great Barrier Reef, one of the ecological wonders of the world, may also be severely affected by the Queensland floods.

Find out what people are saying about the Queensland floods in social media.

The Brisbane River peaked at 4.6m this morning with residents warned there would be shocking scenes of devastation.

A flood survivor has described trying to grab people fighting for their lives only to find they were bodies in turbulent water.

A NZ woman watched in horror as a wall of water swept through the tiny town of Murphys Creek, throwing debris around 'like matchsticks'.

Watch livestreaming footage of the flooded Brisbane River, due to peak at 7am New Zealand time.

The death toll from flooding in the Toowoomba region has risen to 12 with the discovery of two more bodies, while the full impact of the flood terror is now reaching the town of Grantham, where up to 30 could be dead.

The Government is considering a range of measures to assist in flood-ravaged Queensland.

Three thousand homes in Ipswich, southwest of Brisbane, are now under water and 1500 people have gone to evacuation centres, with the predicted flood peak still three hours away.

Peaking river levels in Brisbane could have a devastating effect this evening, with almost 20,000 homes expected to be swamped by tomorrow. Meanwhile, 56,000 homes and businesses are without power and a fire has started at Suncorp Stadium.

Up to 33 per cent of Ipswich, 40km south-west of Brisbane, could be underwater in hours, with floodwaters from the Bremer River, which have already submerged entire blocks of the CBD, set to peak around 2pm (NZT).

A NZ Civil Defence worker who is part of a team helping residents of Queensland is overwhelmed by the scale of the devastation.

Amid tales of tragedy and heroism in the devastating floods, there's always some clowns.

Brisbane is bracing for a high tide this afternoon as thousands evacuate due to flooding in Queensland that has left 10 dead and another 90 missing.