1. On February 11, 1937, a major flood occurred in the Salt River Valley, causing damage to homes, businesses, and agriculture. The flood was caused by heavy rainfall and snowmelt and led to the construction of several dams and levees in the area to prevent future flooding.

2. Arizona celebrated its centennial on February 11, 2012. The state hosted a variety of events and activities throughout the year to mark 100 years since becoming a state in 1912.

3. In 1960, Arizona State University's football team, then known as the Arizona State Sun Devils, played their first game at Sun Devil Stadium on February 11. The team won the game against West Texas State 47-0.

4. On February 11, 1985, the third and final game of the NBA All-Star Game was held in Phoenix, Arizona. The game was won by the Western Conference team, which included players such as Magic Johnson, Kareem Abdul-Jabbar, and Larry Bird.

5. In 2000, the USS Arizona Memorial at Pearl Harbor in Hawaii was added to the National Register of Historic Places on February 11. The memorial honors the 1,177 sailors and Marines who lost their lives when the USS Arizona was attacked and sunk during the Japanese attack on Pearl Harbor on December 7, 1941. Many Arizonans served on the USS Arizona and died in the attack.