Five people, including two children, were killed in a thunderstorm in the Tatra Mountains on the Poland-Slovakia border on Thursday.
A four-day heatwave across western Europe that killed seven people began to ease slightly on Sunday, as temperature alerts were cut back and wildfires slowly brought under control.
A new study has found permafrost at outposts in the Canadian Arctic is thawing 70 years earlier than predicted.
The warm periods are linked with storms that penetrate into the Arctic from the Atlantic and Pacific oceans, and bring the temperature up by as much as 30 C in the middle of winter.
A freak warming around the North Pole is sending a blast of Arctic cold over Europe in a sign of wacky weather that may happen more often with man-made global warming, scientists said Monday.
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