Future-Proofing Coastal Cities Against Sea Level Rise: Adaptation Strategies

Abstract

This paper examines comprehensive adaptation strategies for American coastal cities facing accelerating sea level rise (SLR) in the 21st century, with specific focus on five vulnerable urban centers: Miami, Florida; Norfolk, Virginia; Charleston, South Carolina; New Orleans, Louisiana; and Houston, Texas. Current projections indicate 10-12 inches (25-30 cm) of sea level rise along U.S. coastlines by 2050, with potential for significantly higher levels by 2100 depending on global emissions trajectories. The paper evaluates integrated approaches combining engineered defenses, nature-based solutions, policy frameworks, and managed retreat options tailored to the unique geographic, economic, and social characteristics of each city. Multiple case studies demonstrate that successful adaptation requires multi-stakeholder collaboration, substantial investment, innovative financing mechanisms, and strategic long-term planning. The research concludes that while technical solutions exist to protect critical infrastructure and communities in the near term, their viability diminishes as sea levels continue to rise, necessitating transformative approaches to coastal urban development and management for true long-term resilience.