Over the next fifty years, millions of Americans will be caught up in the churn of displacement created by climate change, forced inland and northward in what will be the largest national migration we've yet to experience. With compassion, Jake Bittle tells the stories of those who are already experiencing life on the move, while detailing just how radically climate change will transform our lives--forcing us out of the country's hardest-hit areas, uprooting countless communities, and prompting a massive migration that will fundamentally reshape the United States.