Boats make their way along the Mississippi river as Saturday the 29th marks the 15th anniversary of Hurricane Katrina in New Orleans, Louisiana, U.S., August 28, 2020. REUTERS/Shannon Stapleton

Boats make their way along the Mississippi river as Saturday the 29th marks the 15th anniversary of Hurricane Katrina in New Orleans, Louisiana, U.S., August 28, 2020. REUTERS/Shannon Stapleton

A man wearing a face mask waves as he walks long the banks of the Mississippi river as the spread of coronavirus disease (COVID-19) continues, in New Orleans, Louisiana U.S., April 13, 2020. REUTERS/Carlos Barria

Jesse Baum walks her dog in the Bywater neighborhood near the Mississippi river where the Carnival Valor cruise ship has been docked in New Orleans, Louisiana, U.S., amid the outbreak of the coronavirus disease (COVID-19), April 12, 2020. According to a Carnival Cruise Line representative, while some crew members were bussed to the airport and flew home on April 8, others are still on the ship have either been held up by travel restrictions, have tested positive for COVID-19 or are exhibiting signs of the flu, and therefore will not be allowed to leave the ship until they are healthy. REUTERS/Kathleen Flynn?

A man plays the bag pipes at dawn at the Mississippi river on Easter Sunday in New Orleans, Louisiana, U.S., amid the outbreak of the coronavirus disease (COVID-19), April 12, 2020. REUTERS/Kathleen Flynn

Cruise ships are pictured on the Mississippi River in New Orleans, Louisiana, U.S. March 17, 2020. REUTERS/Jonathan Bachman

A cruise ship is pictured on the Mississippi River in New Orleans, Louisiana, U.S. March 17, 2020. REUTERS/Jonathan Bachman

A power plant is seen by the Mississippi River in Muscatine, Iowa, U.S., January 28, 2020. REUTERS/Carlos Barria

A power plant is seen by the Mississippi River as a local resident arrives at a campaign event for Democratic 2020 U.S. presidential candidate and former Vice President Joe Biden in Muscatine, Iowa, U.S., January 28, 2020. REUTERS/Carlos Barria

Democratic 2020 U.S. presidential candidate and former Vice President Joe Biden speaks as the Mississippi river is seen reflected in a window during a campaign event in Muscatine, Iowa, U.S., January 28, 2020. REUTERS/Carlos Barria

Democratic 2020 U.S. presidential candidate and former Vice President Joe Biden speaks as the Mississippi river is seen reflected in a window during a campaign event in Muscatine, Iowa, U.S., January 28, 2020. REUTERS/Carlos Barria

A ship parked on the Mississippi River is pictured behind a house during Hurricane Barry in Plaquemines Parish, Louisiana, U.S. July 14, 2019. REUTERS/Jonathan Bachman

A view of downtown New Orleans pictured with the Mississippi River as Tropical Storm Barry approaches land in New Orleans, Louisiana, U.S. July 11, 2019. REUTERS/Jonathan Bachman

Tropical Storm Barry was forecast to bring a coastal storm surge into the mouth of the lower Mississippi River that winds through the heart of New Orleans, pushing its crest to 19 feet on Saturday.

A view of the Mississippi River as Tropical Storm Barry approaches land in New Orleans, Louisiana, U.S. July 12, 2019. REUTERS/Jonathan Bachman

A flood gate for the Mississippi River is seen closed in the French Quarter as Tropical Storm Barry approaches land in New Orleans, Louisiana, U.S. July 12, 2019. REUTERS/Jonathan Bachman

A view of downtown New Orleans pictured with the Mississippi River as Tropical Storm Barry approaches land in New Orleans, Louisiana, U.S. July 11, 2019. REUTERS/Jonathan Bachman

Neil Priggel, 47, is seen on the Mississippi River dock at the Magnitude 7 Metals LLC aluminium smelter which is reopening and taking on hundreds of local workers in New Madrid, Missouri, U.S., May 3, 2018. Picture taken May 3, 2018. REUTERS/Karen Pulfer Focht

A barge passes the Mississippi River dock at the Magnitude 7 Metals LLC aluminium smelter which is reopening and taking on hundreds of local workers in New Madrid, Missouri, U.S., May 3, 2018. Picture taken May 3, 2018. REUTERS/Karen Pulfer Focht

Children are seen in silhouette riding a tricycle along the Mississippi River Park at sunset in Baton Rouge, Louisiana, U.S., March 6, 2018. REUTERS/Shannon Stapleton

A boarded up house sits next to an occupied home on the Ohio River in Cairo, Illinois, U.S., September 19, 2017. Cairo sits at the end of the Ohio River, where it flows into the Mississippi River. Photograph taken at N37°00.097' W89°10.180'. Photograph taken Sept. 19, 2017. REUTERS/Brian Snyder

3A van sits in front of boarded up buildings on the Ohio River in Cairo, Illinois, U.S., September 19, 2017. Cairo sits at the end of the Ohio River, where it flows into the Mississippi River. Photograph taken at N37°00.027' W89°09.937'. Photograph taken September 19, 2017. REUTERS/Brian Snyder

A sign on the flood wall along the Ohio River welcomes visitors to Cairo, Illinois, U.S., September 19, 2017. Cairo sits at the end of the Ohio River, where it flows into the Mississippi River. Photograph taken at N37°00.273' W89°10.147'. Photograph taken Sept. 19, 2017. REUTERS/Brian Snyder

The name of the Cairo Evening Citizen newspaper is seen on its shuttered offices in Cairo, Illinois, U.S., September 20, 2017. Cairo sits at the end of the Ohio River, where it flows into the Mississippi River. REUTERS/Brian Snyder SEARCH "SNYDER BARGES" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

A tugboat crew member leaves work at CGB-Waterfront Marine Service on the Ohio River in Cairo, Illinois, U.S., September 19, 2017. Cairo sits at the end of the Ohio River, where it flows into the Mississippi River. REUTERS/Brian Snyder SEARCH "SNYDER BARGES" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Crew members arrive to work the night shift on tugboats at CGB-Waterfront Marine Service in Cairo, Illinois, U.S., September 19, 2017. Cairo sits at the end of the Ohio River, where it flows into the Mississippi River. REUTERS/Brian Snyder SEARCH "SNYDER BARGES" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

Storm clouds are seen over the Mississippi River as Hurricane Nate approaches the U.S. Gulf Coast in New Orleans, Louisiana, U.S. on October 7, 2017. REUTERS/Jonathan Bachman

People celebrate Mardi Gras outside the French Quarter along the Mississippi river bank in New Orleans, Louisiana U.S., February 28, 2017. REUTERS/Shannon Stapleton

People celebrate Mardi Gras outside the French Quarter along the Mississippi river bank in New Orleans, Louisiana U.S., February 28, 2017. REUTERS/Shannon Stapleton

A woman celebrates Mardi Gras outside the French Quarter along the Mississippi river bank in New Orleans, Louisiana U.S., February 28, 2017. REUTERS/Shannon Stapleton

Picture taken by Swiss adventurer Andre Borschberg onboard Solar Impulse 2 (Si2) during the flight from Tusla/OK to Dayton/OH shows the Mississippi river at sunset, May 21, 2016. Andre Borschberg, Jean Revillard, Christophe Chammartin/SI2/Handout via ReutersATTENTION EDITORS - FOR EDITORIAL USE ONLY. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

Workers remove large wooden pins as they open the floodgates of the Bonnet Carre Spillway in Norco, Louisiana, January 10, 2016. The United states Army Corps of Engineers decided to open the spillway to relieve high water levels in the Mississippi River. REUTERS/Lee Celano

A road starts to flood as the gates of Bonnet Carre Spillway are opened in Norco, Louisiana, January 10, 2016. The United states Army Corps of Engineers decided to open the spillway to relieve high water levels in the Mississippi River. REUTERS/Lee Celano

People watch as the floodgates of Bonnet Carre Spillway are opened Norco, Louisiana, January 10, 2016. The United states Army Corps of Engineers decided to open the spillway to relieve high water levels in the Mississippi River. REUTERS/Lee Celano

Workers remove large wooden pins as water rushes into the Bonnet Carre Spillway in Norco, Louisiana, January 10, 2016. The United states Army Corps of Engineers decided to open the spillway to relieve high water levels in the Mississippi River. REUTERS/Lee Celano

Workers remove large wooden pins as they open the floodgates of Bonnet Carre Spillway in Norco, Louisiana, January 10, 2016. The United States Army Corps of Engineers decided to open the spillway to relieve high water levels in the Mississippi River. REUTERS/Lee Celano

Steve Sands came with his son Weston to see the rising waters in the Mississippi River as flood waters approach their crest in Greenbelt Park in Memphis, Tennessee January 4, 2016. Tennessee residents girded on Monday for the rapidly rising Mississippi River to crest within days as Oklahoma officials found the body of a country-rock singer whose boat capsized on a lake in late December. REUTERS/Karen Pulfer Focht TPX IMAGES OF THE DAY

Barbara Bradley looks off of her porch as water creeps up near her home in the upscale neighborhood of Harbor Town in Memphis, Tennessee January 4, 2016. Tennessee residents girded on Monday for the rapidly rising Mississippi River to crest within days as Oklahoma officials found the body of a country-rock singer whose boat capsized on a lake in late December. REUTERS/Karen Pulfer Focht

Barbara Bradley walks her dog as water creeps up near her home in the upscale neighborhood of Harbor Town in Memphis, Tennessee January 4, 2016. Tennessee residents girded on Monday for the rapidly rising Mississippi River to crest within days as Oklahoma officials found the body of a country-rock singer whose boat capsized on a lake in late December. REUTERS/Karen Pulfer Focht

Barbara Bradley walks her dog as water creeps up near her home in the upscale neighborhood of Harbor Town in Memphis, Tennessee January 4, 2016. Tennessee residents girded on Monday for the rapidly rising Mississippi River to crest within days as Oklahoma officials found the body of a country-rock singer whose boat capsized on a lake in late December. REUTERS/Karen Pulfer Focht

Steve Sands takes pictures of the rising waters in the Mississippi River as flood waters approach their crest in Greenbelt Park in Memphis, Tennessee January 4, 2016. Tennessee residents girded on Monday for the rapidly rising Mississippi River to crest within days as Oklahoma officials found the body of a country-rock singer whose boat capsized on a lake in late December. REUTERS/Karen Pulfer Focht TPX IMAGES OF THE DAY

Water creeps up near some homes in the upscale neighborhood of Harbortown, as flood waters approach their crest in Memphis, Tennessee January 4, 2016. Significant flooding was expected into mid-January along the Mississippi River at points downstream, from Tennessee to Mississippi, Arkansas and Louisiana. The river is expected to crest at the moderate flood stage on Thursday in Memphis, Tennessee, according to the NWS. REUTERS/Karen Pulfer Focht

City of Memphis employees, closed roads as flood waters approach their crest in Memphis, Tennessee January 4, 2016. Significant flooding was expected into mid-January along the Mississippi River at points downstream, from Tennessee to Mississippi, Arkansas and Louisiana. The river is expected to crest at the moderate flood stage on Thursday in Memphis, Tennessee, according to the NWS. REUTERS/Karen Pulfer Focht

City of Memphis employees, closed roads and marked detours on Monday, as flood waters approach their crest in Memphis, Tennessee January 4, 2016. Significant flooding was expected into mid-January along the Mississippi River at points downstream, from Tennessee to Mississippi, Arkansas and Louisiana. The river is expected to crest at the moderate flood stage on Thursday in Memphis, Tennessee, according to the NWS. REUTERS/Karen Pulfer Focht

City of Memphis employees, closed roads and marked detours on Monday, as flood waters approach their crest in Memphis, Tennessee January 4, 2016. Significant flooding was expected into mid-January along the Mississippi River at points downstream, from Tennessee to Mississippi, Arkansas and Louisiana. The river is expected to crest at the moderate flood stage on Thursday in Memphis, Tennessee, according to the NWS. REUTERS/Karen Pulfer Focht

The Mississippi River is pictured flowing at 800,000 CFS (cubic feet per second) measured by the U.S. Geological Survey (USGS) in St. Louis, Missouri, December 31, 2015. Missouri and Illinois were bracing for more flooding on Thursday as rain-swollen rivers, some at record heights, overflowed their banks, washing out hundreds of structures and leaving thousands of people displaced from their homes. REUTERS/Kate Munsch

The Mississippi River is pictured flooding parts of downtown St. Louis, Missouri December 31, 2015. Missouri and Illinois were bracing for more flooding on Thursday as rain-swollen rivers, some at record heights, overflowed their banks, washing out hundreds of structures and leaving thousands of people displaced from their homes. REUTERS/Kate Munsch

U.S. Geological Survey (USGS) hydro technician Jason Carron assesses the Mississippi River flood waters in St. Louis, Missouri December 31, 2015. Missouri and Illinois were bracing for more flooding on Thursday as rain-swollen rivers, some at record heights, overflowed their banks, washing out hundreds of structures and leaving thousands of people displaced from their homes. REUTERS/Kate Munsch

The Mississippi River is pictured flowing at 800,000 CFS (cubic feet per second) measured by the U.S. Geological Survey (USGS) in St. Louis, Missouri, December 31, 2015. Missouri and Illinois were bracing for more flooding on Thursday as rain-swollen rivers, some at record heights, overflowed their banks, washing out hundreds of structures and leaving thousands of people displaced from their homes. REUTERS/Kate Munsch

U.S. Geological Survey (USGS) hydro technicians, Eric Looper (L), Paul Rydlund and Jason Carron (R) measure flood waters on the Mississippi River, in St. Louis, Missouri December 31, 2015. Missouri and Illinois were bracing for more flooding on Thursday as rain-swollen rivers, some at record heights, overflowed their banks, washing out hundreds of structures and leaving thousands of people displaced from their homes. REUTERS/Kate Munsch

U.S. Geological Survey (USGS) hydro technician Scott Southern shows the results as field crews measure flood waters in Eureka, Missouri December 31, 2015. Missouri and Illinois were bracing for more flooding on Thursday as rain-swollen rivers, some at record heights, overflowed their banks, washing out hundreds of structures and leaving thousands of people displaced from their homes. REUTERS/Kate Munsch

Scott Southern (L) and Aaron Walsh, hydro technicians with the U.S. Geological Survey (USGS), measure flood waters with an Acoustic Doppler Current Profiler in Eureka, Missouri December 31, 2015. Missouri and Illinois were bracing for more flooding on Thursday as rain-swollen rivers, some at record heights, overflowed their banks, washing out hundreds of structures and leaving thousands of people displaced from their homes. REUTERS/Kate Munsch

Cotton planted by farmer Lawrence Smith is harvested in Florence, Alabama October 23, 2015. Lawrence Smith is a second generation cotton farmer and his son Ryan works with him on the harvest. Fields along the Mississippi River Delta once gleamed white in the autumn with acre upon acre of cotton ready to be picked. This year U.S. farmers planted the fewest acres of cotton since 1983, according to U.S. Department of Agriculture data. REUTERS/Brian Snyder PICTURE 10 OF 28 FOR WIDER IMAGE STORY "THE LEGACY OF 'KING COTTON' IN THE AMERICAN SOUTH" SEARCH "KING COTTON" FOR ALL IMAGES

"KKK" and a swastika are painted on an abandoned and decaying tenant farmer's, or sharecropper's, house in Moundville, Alabama October 25, 2015. Cotton farmer Shep Morris describes the decaying tenant homes of former farm employees as "scattered throughout the cotton belt and slowly fading away." Fields along the Mississippi River Delta once gleamed white in the autumn with acre upon acre of cotton ready to be picked. This year U.S. farmers planted the fewest acres of cotton since 1983, according to U.S. Department of Agriculture data. REUTERS/Brian Snyder PICTURE 4 OF 28 FOR WIDER IMAGE STORY "THE LEGACY OF 'KING COTTON' IN THE AMERICAN SOUTH" SEARCH "KING COTTON" FOR ALL IMAGES

Farm worker Leon Strickland sits outside his home in Tunica, Mississippi October 24, 2015. Strickland picked cotton by hand as a child and has worked for the same family of farmers since 1965. Fields along the Mississippi River Delta once gleamed white in the autumn with acre upon acre of cotton ready to be picked. This year U.S. farmers planted the fewest acres of cotton since 1983, according to U.S. Department of Agriculture data. REUTERS/Brian Snyder TPX IMAGES OF THE DAY PICTURE 8 OF 28 FOR WIDER IMAGE STORY "THE LEGACY OF 'KING COTTON' IN THE AMERICAN SOUTH" SEARCH "KING COTTON" FOR ALL IMAGES

Sunlight hits graves in the family cemetery on the Morris farm in Shorter, Alabama October 26, 2015. The cemetery and surrounding field were once part of the Walker Planation, which was owned by Marguerite Morris' ancestors in the antebellum South. Fields along the Mississippi River Delta once gleamed white in the autumn with acre upon acre of cotton ready to be picked. This year U.S. farmers planted the fewest acres of cotton since 1983, according to U.S. Department of Agriculture data. REUTERS/Brian Snyder PICTURE 5 OF 28 FOR WIDER IMAGE STORY "THE LEGACY OF 'KING COTTON' IN THE AMERICAN SOUTH" SEARCH "KING COTTON" FOR ALL IMAGES

Cotton grows in a field around a home in Florence, Alabama October 23, 2015. Fields along the Mississippi River Delta once gleamed white in the autumn with acre upon acre of cotton ready to be picked. This year U.S. farmers planted the fewest acres of cotton since 1983, according to U.S. Department of Agriculture data. REUTERS/Brian Snyder PICTURE 9 OF 28 FOR WIDER IMAGE STORY "THE LEGACY OF 'KING COTTON' IN THE AMERICAN SOUTH" SEARCH "KING COTTON" FOR ALL IMAGES

A worker waits for a bale of cotton to emerge from the gin at the farmer-owned Milstead Farm Group gin in Shorter, Alabama October 26, 2015. The gin produces one bale every one minute and fifty seconds. Fields along the Mississippi River Delta once gleamed white in the autumn with acre upon acre of cotton ready to be picked. This year U.S. farmers planted the fewest acres of cotton since 1983, according to U.S. Department of Agriculture data. REUTERS/Brian Snyder PICTURE 15 OF 28 FOR WIDER IMAGE STORY "THE LEGACY OF 'KING COTTON' IN THE AMERICAN SOUTH" SEARCH "KING COTTON" FOR ALL IMAGES

The building that housed the WB Davis Hosiery Mill stands beside the railroad tracks in Fort Payne, Alabama October 22, 2015. Many manufacturers have closed in Fort Payne, which was once known as the "Sock Capital of the World." Fields along the Mississippi River Delta once gleamed white in the autumn with acre upon acre of cotton ready to be picked. This year U.S. farmers planted the fewest acres of cotton since 1983, according to U.S. Department of Agriculture data. REUTERS/Brian Snyder PICTURE 20 OF 28 FOR WIDER IMAGE STORY "THE LEGACY OF 'KING COTTON' IN THE AMERICAN SOUTH" SEARCH "KING COTTON" FOR ALL IMAGES