droughts droughts

A "hunger stone" exposed by the low level of water in the Elbe River is seen in Decin, Czech Republic, on Thursday. The low level of water caused by the recent drought has exposed the stones on the riverbed. Petr David Josek/AP hide caption

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Petr David Josek/AP

Waves crash onto the beach near Brighton Pier in England, in January 2007. Gale force winds and heavy rain brought disruption to large parts of the country. Severe weather events like this one may be linked to more frequent fluctuations in the polar jet stream, according to a new study. Peter Macdiarmid/Getty Images hide caption

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Peter Macdiarmid/Getty Images