Floods and powerful cyclones will remain as features of the Australian weather in the current century but scientists warned that scorching heat waves will also intensify in the decades ahead, no thanks to the worsening global warming.

According to the new report titled 'State of the Climate 2012', jointly prepared by the Bureau of Meteorology and CSIRO, Australia's general climate will rise by up to 5.0 degrees Celsius over the next 60 years, possibly reaching the zenith by 2070.

The projection was based on the average hike in national temperature that was recorded since 1911, the report said, and the pace of global warming that has accelerated since the onset of the industrial era.

Australia has registered spikes on its temperature since 1910 onwards and has never looked back since then, paving the way for more heat waves to beat down on the country unless greenhouse emissions were reduced considerably, the report said.

Alongside with the rising level of warming, mixtures of weather disturbances will continue to hit Australia, which has seen in the past few years devastating storms that spawned destructive floods.

The report warned too that year-round weather cycles would produce punishing heat spells that in the past had caused devastating droughts and bushfires.

And only one glaring reason was pinpointed by the government report - the high concentrates of greenhouse emissions that last year alone led to what scientists called as "significant further global warming."

If the current levels will be sustained over the next 20 years, Australia will witness heat spikes of up to 1.5 degrees Celsius, the report said.

The level that the mercury had jumped so far, according to Karl Braganza, chief of climate monitoring at the Bureau of Meteorology, was definitely alarming.

"Global changes of this magnitude happen very rarely. They happen when asteroids strike, they happen when there's planetary volcanic activity," Braganza told ABC.

He blamed man's heavy reliance on fossil fuels for the harsher weather conditions to come.

"They're happening now because we're digging up fossil fuels and basically burning them all. And we're doing that very, very rapidly," the scientist said.

"Unless greenhouse gas emissions decrease, we expect to see the temperature of the atmosphere and the oceans continue to warm and sea levels continue to rise at current or even higher rates than reported here," Braganza was reported by Agence France Presse (AFP) as saying on Wednesday.