U.S. ports are significant to the U.S. economy, handling more than 2 billion tons of domestic & import/export cargo annually. Since Sept. 11, 2001, much of the national focus on ports¿ preparedness has been on preventing potential acts of terror, but the 2005 hurricane season renewed focus on how to protect ports from a diversity of threats, including natural disasters. This report examines: (1) challenges port authorities have experienced as a result of recent natural disasters; (2) efforts under way to address these challenges; & (3) the manner in which port authorities plan for natural disasters. The author reviewed documents & interviewed various port stakeholders from 17 major U.S. ports. Includes recommendations. Charts & tables.