Tegan Wendland

Louisiana's coastline is disappearing into the Gulf of Mexico, taking with it many historic sites. Archaeologists are scrambling to document what they can before it's gone.

A tweet this week prompted dozens of New Orleans residents to post their childhood photos with the same Santa Claus. He's been a part of Christmas there for decades.

When deadly flooding rains swamped southern Louisiana last month, it destroyed lives and property. And it also caused millions of dollars of damage to the state's agriculture industry.

Details are emerging from the historic floods that devastated communities in southern Louisiana. At least 11 people have been reported dead, at least 40,000 homes were affected, and some 30,000 people were rescued.

Members of a Native American community in south Louisiana are retreating from their coastal home and trying to preserve their culture in the process.

In preparation for sea level rise, vulnerable cities are building infrastructure to protect themselves. But as a look at New Orleans and Philadelphia shows, the strategies are unique to each city.

For the first time, companies can apply to set up fish farms in U.S. federal waters. The government says the move will help reduce American dependence on foreign seafood and improve security.