Feeling hot hot hot... Australians are set to face one of the largest heatwaves in decades in 2013. Simone De Peak

By Peter Hannam, Carbon economy editor
3 January 2013

AUSTRALIA'S notoriously variable climate is on full display, with parts of the nation about to experience one of the largest heatwaves in territorial extent in decades, after coming off a sharp shift last year from wetter- to drier-than-average conditions.

A swath of central Australia stretching from Oodnadatta to Coober Pedy and Birdsville can expect maximum temperatures of 45 degrees or hotter for at least a week. Towns to the south and east, such as Mildura and Hay, can expect to broil with 40-degree maximum temperatures for just as long.

''We have a major heat event under way,'' Karl Braganza, a manager of climate monitoring at the Bureau of Meteorology, said. ''There are not many instances in the historical record where you get a heat event covering such a large area of the continent.''

Brett Dutschke, a senior meteorologist at Weatherzone, said it was unusual to have so prolonged a hot spell. "It's a once-in-20 or 30-year heatwave event in desert areas," he said. "For more populated areas further south, it means they are going to experience some of this as well."

It is forecast to hit 36 degrees in Melbourne on Thursday and 41 degrees on Friday, with temperatures soaring in Canberra. Sydney will largely be spared.

Much of south-eastern Australia has weathered warm temperatures for months. "We effectively had mid-summer heat arriving at the end of spring," Dr Dutschke said.

Centre set to swelter as biggest heatwave in decades settles in

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