article_snippet.sent: Since the year 2000, seven western states in the US has seen seven western states in the US driest periods in centuries: Arizona, California, Colorado, Nevada, New Mexico, Utah and Wyoming.
article_snippet.sent: And scientists in California have warned that the region may be experiencing a century-long 'mega-drought'.
article_snippet.sent: The warnings came after sediment studies showed California is currently experiencing the driest spell since 1580, and that the regular rainfall seen during the last century is likely to have been a temporary deviation in a cycle of droughts and very occasional rainfall over the last 3,000 years.
article_snippet.sent: In 2013, California received less rain than in any year since California formation as a state in 1850.
article_snippet.sent: And the last four years have seen the worst conditions, with California California now declared to be experiencing a drought.
article_snippet.sent: The ongoing drought is one of California's worst in history.
article_snippet.sent: The last four years have seen the worst conditions, with California California now declared to be experiencing a drought said the US Department of Agriculture.
article_snippet.sent: California has had to drastically cut back on water use to deal with the four-year drought that continues to cause devastation.
article_snippet.sent: A Californian farmer is pictured surveying A Californian farmer drought-hit land in San Luis Obispo County .