Due to dry Mississippi River conditions, Gulf of Mexico saltwater intrusion threatens southern Louisiana's health and economy. This region relies on the Mississippi River for drinking, irrigation, and transportation. Due to the drought, river levels are near-historic lows, allowing saltwater to travel upstream quicker. This worrying phenomena threatens freshwater quality and availability in affected areas.

Seawater may reach Belle Chasse, St. Bernard, and New Orleans intake facilities in the coming weeks despite pure drinking water throughout much of Louisiana. The rise in water salinity may boost salt levels, which is particularly dangerous for babies, pregnant women, and those who need to limit sodium intake. President Joe Biden declared a federal emergency, paying state and local aid. The U.S. Army Corps of Engineers is building underwater barriers to curb invasion, but challenges persist.

This intrusion can destroy infastructure and severely hinder economic activity. However, the problem extends further than just this: irrigation farmers, for example, may be forced to use saltier waters which damages crops. Such a disaster shed a light on how climate change has continued to have a devastating impact around the world.