Millions of people in southeastern Australia are sweating through a record-breaking heatwave. The heat this week is likely to be one for the history books. The heat began on Saturday January 24th. On Australia Day, three sites in South Australia and two in New South Wales broke their all-time temperature records. Ceduna reached a whopping 49.5°C in the shade – just 1.2°C off the highest temperature ever recorded in Australia.

Today, temperatures have topped 49°C in northwest Victoria and South Australia for the first time on record, and many towns face days of heat over 40°C. Regions such as the Otway Ranges in Victoria are facing extreme fire danger. Renmark in South Australia has reached 49.3°C and Walpeup in Victoria has reached 48.7°C.

This is shaping up as the worst heatwave since the Black Summer of 2019-20. The intense heat that summer contributed to catastrophic bushfires which burnt 21% of the continent, an area still considered globally unprecedented.

Independent analysis found the last heatwave between January 5 to 10 was made over five times more likely by global heating. This current heatwave is substantially worse, but we’ll have to wait for attribution studies to understand how much global heating has contributed to its overall severity.

The sustained heat hitting the southeast will be widespread and prolonged. It’s likely more all-time temperature........

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