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In June 2020, temperatures in the Arctic Circle may have reached record levels after the mercury hit 38°C (100°F) in Verkhoyansk, a Siberian town. Steve Vavrus, a climatologist from the University of Wisconsin-Madison, explains why heatwaves like this occur and discusses their link with global warming.

Interview from Science in Action (Thursday 25th June).

(Image: Temperature map of Verkhoyansk, Credit: Getty Images.)