Dangerous blue-green algae bloom: Gulf beaches remain closed in Mississippi


All beaches on the Gulf Coast of Mississippi are closed for swimming due to toxic blue-green algae.

The harmful cyanobacteria have been detected at all 21 Mississippi beaches. Visitors have been warned to avoid contact with the water. The blooms can cause health issues in humans.

Mississippi Beaches Remain Closed by Blue-Green Algae Blooms Despite Tropical Storm Barry. Picture via Weather

Despite heavy rainfall from Tropical Storm Barry, toxic blue-green algae remains along the Mississippi Gulf Coast.

All of Mississippi’s 21 Gulf Coast beaches have been closed to swimming because of an expanding toxic blue-green algae bloom. The closings started June 22, and the final two beaches, Pascagoula Beach West and Pascagoula Beach East, were closed July 7.

Visitors can still use the beaches, the MDEQ said, but they should avoid contact with the water.

The blue-green algae, known as cyanobacteria, can cause rashes, stomach cramps, nausea, diarrhea and vomiting.

The cyanobacteria has been caused, in part, by the opening of the Bonnet Carre spillway, 27 miles upriver from New Orleans. For the first time in the spillway’s 90-year history, it has been opened twice because of flooding in the Mississippi River.

Disaster declarations

The governors of Mississippi and Louisiana have asked for disaster declarations because of the damage done to their states’ fishing industries by the flooding. The flow of fresh water reduces salinity, making it difficult for oysters to survive. The runoff also is rich in nutrients, such as nitrogen and phosphorous, that causes the cyanobacteria to bloom. The blooms deplete oxygen in the water, creating a “dead zone” that can result in fish kills and other devastating effects.

So far, the levels of cyanobacteria being detected off Mississippi beaches have not reached toxic levels, the Clarion Ledger reported. Still, state officials are advising against eating fish or other seafood from water where the bloom is present.

The National Park Service said beaches along the barrier islands that are part of the National Seashore have not been affected by the algae blooms.

Here is a list of the 21 closed beaches:

Hancock County — Lakeshore Beach, Buccaneer State Park Beach, Waveland Beach, Bay St. Louis Beach

Harrison County — Pass Christian West Beach, Pass Christian Central Beach, Pass Christian East Beach, Long Beach Beach, Gulfport Central Beach, Gulfport West Beach, Gulfport Harbor Beach, East Courthouse Road Beach in Gulfport, Gulfport East Beach, Edgewater Beach, Biloxi West Central Beach, Biloxi East Central Beach, Gulfport Harbor Beach

Jackson County — Front Beach in Ocean Springs, Shearwater Beach in Ocean Springs, Pascagoula East, Pascagoula West

[AL, Weather]

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