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Environment
Matthew Patterson, Postdoctoral Research Assistant in in Atmospheric Physics, University of Oxford

One of 2023's most extreme heatwaves is happening in the middle of winter

Temperature anomaly on Wednesday August 2 2023. Red areas of Chile and northern Argentina are much hotter than the long-term average for this time of year. ClimateReanalyzer.org, CC BY-SA

Temperatures in parts of Chile and northern Argentina have soared to 10°C-20°C above average over the last few days. Towns in the Andes mountains have reached 38°C or more, while Argentina’s capital, Buenos Aires, saw temperatures above 30°C – breaking its previous August record by more than 5°C. Temperatures peaked at 39°C in the town of Rivadavia.

Bear in mind it’s mid-winter in this part of the world. And it’s far south enough that seasonal variations have a substantial impact on temperatures. Buenos Aires, for instance, is as far south as Japan, Tibet or Tennessee are north.

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