Americans are flocking to the coasts faster than ever before. And with much of the nation's priciest properties already concentrated near shorelines, this puts more people and buildings at risk from the kind of extreme storms and flooding linked to climate change. But for many communities across the U.S. the toll is likely to go far beyond physical damage. Rising sea levels could have a knock-on effect, making certain areas unlivable long before they're uninhabitable, effectively creating zombie towns, according to a new analysis from nonprofit environmental group Climate Central that looks at the financial impact of sea-level rise over...