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Droughts and Heat Waves
Southwest and Great Plains at risk of 21st century 'mega-drought'
Southwest and Great Plains at risk of 21st century 'mega-drought'

Global warming will bring the "unprecedented" risk of a decades-long mega-drought in the American Southwest and Great Plains during the second half of the century, researchers claim. The forecast, which was published online Thursday in the new journal Science Advances, contrasts sharply with other recent assessments that report greater uncertainty about future droughts, according to study authors. The researchers used historic tree ring data and three drought measures to conclude that there was at least an 80% chance of a 35-year-long drought occurring by the end of this century. "Imagine a naturally occurring drought, such as the one occurring...

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