US south-west in grip of historic 'megadrought', research finds
by Samuel Gilbert from on (#542DW)
Intensified by climate change, the current 20-year arid period is one of the worst on record, with wide-ranging effects
When Ken Pimlott began fighting US wildfires at the age of 17, they seemed to him to be a brutal but manageable natural phenomenon.
Related: Dust bowl conditions of 1930s US now more than twice as likely to reoccur
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