‘A deep, deep column of warm air’ more typical of January is expected to break records in Melbourne, Canberra and Sydney

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Eastern Australia’s first big heatwave of spring will send temperatures soaring 12C or more above average in regions including Sydney by early next week as a weather pattern more typical of mid-summer takes hold.

“A deep, deep column of warm air” has built up over Australia, Karl Braganza, national manager of climate services at the Bureau of Meteorology, said. “You typically see that occurring in January.”

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