Your cohosts talk chihuahuas and squirrels on the verge on this week's podcast. Then (14:56) we are delighted to welcome Orrin Pilkey Jr., Professor Emeritus at Duke University, to the podcast. Orrin is one of the world's foremost experts on sea level rise and has just co-authored a new book with his son Keith Pilkey called Sea Level Rise: A Slow Tsunami on America's Shores (Duke U Press, 2019; https://www.dukeupress.edu/sea-level-rise). Orrin tells us how it was a hurricane that first prompted him to start studying coastal environments. We talk about how sea level rise is finally beginning to see some real political attention in threatened areas but about the limits of what can be done to hold the oceans at bay. Orrin explains how, for example, Miami and New Orleans are doomed, if for different reasons, and asks what will become of their millions of climate refugees. We talk about the need to take retreat seriously as the best option for dealing with sea level rise and how costly measures like seawalls and beach nourishment programs create their own environmental problems. We touch on subsidence, rebounding and other factors influencing coastal erosion, and then discuss the hundreds of critical infrastructure facilities that are sited no more than four feet above sea level. We close on the book's recommendations to people already living on the coast about what to do now, including sample letters one could write to family members to get them thinking about the impacts of sea level rise.