The era of climate migration is, virtually unheralded, already upon America. The population shift gathering pace is so sprawling that it may rival anything in US history. This enormous migration will probably take place over a longer period than the Dustbowl but its implications are both profound and opaque. It will plunge the US into an utterly alien reality. Lab co-director Solomon Hsiang, of University of California, Berkeley, weighs in on insights from his research, as does Amir Jina, of the Energy Policy Institute at the University of Chicago. The reporter also notes a study published last year by Lab researchers that found that the economies of the southern states, along with parts of the west, will suffer disproportionately as temperatures rise.