The explosion of the Deepwater Horizon drilling rig in the Gulf of Mexico on April 20, 2010, and the resulting oil spill began a cascade of effects on the coastal areas of the Gulf and on the wealth of species that inhabit those areas. These wetlands, like those elsewhere, have value for water quality, flood control, shoreline protection, and recreation. Contents of this report: (1) Introduction; (2) Why Are Wetlands Important?; (3) Coastal Wetlands and Assets in the Gulf of Mexico; (4) Oil Spills: Impacts on Wetland Habitats and Animals; (5) Weather and Storms; (6) Mitigation and Cleanup of Wetlands; (7) Oil Spill Response; (8) Cleanup and Recovery Issues; (9) Conclusion. Charts and tables.