U.S. Coast Guard assists in several dramatic Louisiana flood rescues.

Video. U.S. Coast Guard assists in several dramatic Louisiana flood rescues.

The U.S. Coast Guard from Air Station New Orleans assisted in several rescues in Baton Rouge, Louisiana.

The U.S. Coast Guard from Air Station New Orleans assisted in several rescues in Baton Rouge, Louisiana.

Among those rescued was a young boy, who was pulled from the roof of a home that had become almost completely submerged.

U.S. President Barack Obama issued a disaster declaration on Sunday (August 14) for flood-ravaged Louisiana, where at least five people have died and emergency crews have rescued more than 20,000 people stranded by unprecedented flooding.