Climate Change Could Bring Back 'Megadroughts' That Last For Multiple Decades In The American Southwest Droughts that last for more than a decade can occur once again in the American Southwest if climate change is not mitigated. Scientists looked back into the past to figure out what caused megadroughts in the 9th to 15th century. by Diane Samson
Science Scientists Create Climate Map Of Western US 21,000 Years Ago: How It Will Help Understand Potential 'Megadrought' by Jim Algar
Science American Southwest and Central Plains Face Megadrought Risk: Culprit? Carbon Emissions by Rhodi Lee