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The record heat has a name: Omega block
It's not surprising that there will be a heat wave during the summer. But for the heat to settle over Europe this early is all the more unusual. The explanation is a so-called omega block, where warm air from the Sahara becomes "stuck". "It becomes almost like a greenhouse; the sun shines in but the air is not replaced," says Magnus Joelsson, meteorologist at SMHI.
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