1. Hurricane Katrina made landfall on September 3, 2005, devastating much of Louisiana and causing major flooding in New Orleans. The storm caused extensive damage and loss of life, with over 1,800 people killed across the Gulf Coast region.

2. The Louisiana Purchase was signed on September 3, 1803, marking a significant moment in the state's history. The purchase of Louisiana Territory from France doubled the size of the United States and helped to expand westward settlement and development.

3. Louis Armstrong, one of the most influential jazz musicians of the 20th century, was born on September 3, 1901, in New Orleans. Armstrong's innovative style and virtuosic trumpet playing helped to popularize jazz and put the city of New Orleans on the map as a hub of musical creativity.

4. One of the deadliest fires in Louisiana history took place on September 3, 1860, at the St. Charles Hotel in New Orleans. The hotel, which was one of the most luxurious in the city, was completely destroyed in the blaze, which killed at least 30 people and injured many more.

5. In 2003, Louisiana became the first state in the country to offer a tax incentive program for film production. The program has helped to create a thriving film industry in Louisiana, with many movies and TV shows being filmed in the state each year. Some of the biggest productions to be filmed in Louisiana include True Blood, Django Unchained, and 12 Years a Slave.