
Some of the leading hotspots in the United States are on track to become even more sweltering in the coming decades — thanks to a combination of greenhouse gas emissions, urban development and population growth. In a new study, researchers estimate that over the course of this century, the biggest relative increases in extreme heat will hit cities in the Sunbelt — including Atlanta; Austin, Texas; Miami and Orlando, Fla. And lest Americans outside those areas breathe a sigh of relief, the study also warns of rising temperatures in major metropolises like New York City, Los Angeles and Washington, D.C. That is, at least, if no efforts are taken to counter the trend. The projections are based on a “business-as-usual” model, explained lead researcher Ashley Broadbent. He’s an assistant research professor at Arizona State University, in Tempe. “We’re imagining what would happen if we keep going along as we are,” said Broadbent, who noted that’s not an unrealistic assumption. “But,” he stressed, “there are things we can do.” The biggest and broadest would be tackling greenhouse gas emissions — heat-trapping gases that are spewed into the air when fossil fuels (like coal, oil and natural gas) are burned. But on the local level, Broadbent said, greenhouse gases are not the only contributor to rising temperatures and people’s actual experience of heat. There are also factors… read on >