Vanishing Shorelines: Louisiana’s Coastal Crisis

Written by: Kerry Barlow

Louisiana's coastline is slowly disappearing, creating one of the state's most serious long-term environmental challenges. Unlike a hurricane or flood, which can cause destruction in a matter of hours, coastal land loss often happens gradually. Year after year, however, the loss can become significant, changing the landscape and threatening communities, wildlife habitats, wetlands, and Louisiana's unique way of life.

Several factors contribute to Louisiana's disappearing coast. Coastal erosion gradually wears away shorelines, while land subsidence causes the ground to sink. Rising sea levels place additional pressure on low-lying coastal areas, and saltwater intrusion can damage freshwater ecosystems, vegetation, and agricultural areas. The loss of wetlands is particularly concerning because these areas provide natural protection from storms while also serving as important habitats for fish, birds, and other wildlife.

Human activity has also played an important role in changing the coastal environment. Changes to river channels can interrupt the natural movement of sediment that once helped rebuild Louisiana's wetlands. Oil and gas canals have also cut through coastal marshes, altering water flow and allowing saltwater to move farther inland. Over time, these changes can weaken wetlands and make it more difficult for the coast to naturally recover.

The consequences extend far beyond the shoreline. Coastal communities depend on the land and surrounding waters for homes, fishing, transportation, tourism, and other industries. As wetlands disappear, communities can become increasingly vulnerable to hurricanes, storm surge, and flooding. The loss of coastal land also threatens ecosystems and places that have been part of Louisiana's cultural heritage for generations.

Coastal land loss is therefore more than an environmental issue—it is a challenge involving Louisiana's economy, communities, history, and future. Protecting and restoring wetlands, preserving natural habitats, and finding ways to slow the loss of land are essential to maintaining the state's coastal landscape. Louisiana's coast is not simply land on a map; it is a living landscape shaped by water, people, wildlife, and generations of history.

Coastal Protection and Restoration Authority of Louisiana. “Coastal Crisis.” Coastal Protection and Restoration Authority, State of Louisiana, coastal.la.gov. Accessed 12 Sept. 2026.

Couvillion, Brady R., et al. Land Area Change in Coastal Louisiana (1932 to 2016). U.S. Geological Survey, 2017, Scientific Investigations Map 3381, USGS publication.

Olea, Ricardo A., and James L. Coleman. “A Synoptic Examination of Causes of Land Loss in Southern Louisiana as Related to the Exploitation of Subsurface Geologic Resources.” Journal of Coastal Research, vol. 30, no. 5, 2014, pp. 1025–1044. U.S. Geological Survey, USGS publication.

Steyer, Gregory D., et al. Influence of the Houma Navigation Canal on Salinity Patterns and Landscape Configuration in Coastal Louisiana. U.S. Geological Survey, 2008, Open-File Report 2008–1127