In usage in the Southern United States, a bayou is a body of water typically found in a flat, low-lying area. It may refer to an extremely slow-moving stream, river, marshy lake, wetland, or creek. They typically contain brackish water highly conducive to fish life and plankton. Bayous are commonly found in the Gulf Coast region of the southern United States, especially in the Mississippi River Delta, though they also exist elsewhere.

The Bayou Corne sinkhole was created from a collapsed underground salt dome cavern operated by Texas Brine Company and owned by Occidental Petroleum. The sinkhole, located near the community of Bayou Corne in northern Assumption Parish, Louisiana, was discovered on August 3, 2012, and 350 nearby residents were advised to evacuate. Scientists have stated that the evacuation order could last for years.