It’s getting hot in here. According to a new study, increasing temperatures and decreasing rainfall could mean Southwestern states see harsh, desert-like conditions almost year-round within the next 100 years. This so-called megadrought would be similar to the worst dry spells of the past century — only lasting for 35 years or more. Besides massive environmental damage, a megadrought would result in serious water restrictions and health problems. So how do we stop it? Scientists say we must start taking reducing greenhouse gas emissions seriously.