From Amelia Island just south of Georgia to Key West’s southern tip, beaches are one of Florida’s greatest assets. Yet these beaches are in danger: rapid structural development on a highly erodible coast make them vulnerable to some of nature’s greatest storms. The same development that has been driven by the attraction of beautiful beaches and coastal amenities now threatens those very resources. In turn, coastal structures are at risk from sea-level rise, shoreline retreat, winter storms, and hurricanes. Most of the methods for reducing losses associated with storms protect property only in the short term—at a growing cost in dollars and loss of natural habitat in the long term.