1. Louisiana was admitted to the Union on April 30, 1812, just a few days after April 27. This made Louisiana the 18th state in the United States.

2. On April 27, 1865, the steamboat Sultana exploded and sank in the Mississippi River near Memphis, Tennessee. Many of the passengers on board were Union soldiers who had been recently released from Confederate prison camps. Over 1,800 people died in the disaster, making it the deadliest maritime accident in US history.

3. On April 27, 1936, Louisiana Governor Huey P. Long announced plans to build a new state capitol in Baton Rouge. The building, which was completed in 1932, is the tallest capitol building in the United States.

4. On April 27, 1973, the Louisiana Superdome opened in New Orleans. The stadium, which has a seating capacity of over 76,000, has hosted a number of high-profile events, including seven Super Bowls, five NCAA Final Fours, and several concerts.

5. On April 27, 2011, a series of tornadoes swept across Louisiana and other parts of the southern United States. The storms caused widespread damage and killed over 300 people in Alabama, Georgia, Mississippi, Tennessee, and Virginia. In Louisiana, tornadoes touched down in several parishes, causing significant property damage and injuring several people.