1. In 1962, the Seattle World's Fair officially closed on August 13 after six months of activity. The fair drew over 10 million visitors and showcased new technological innovations, including the Space Needle and the monorail system.

2. On August 13, 1980, Mount St. Helens in southwest Washington erupted, causing the largest landslide in recorded history and killing 57 people. The eruption also created a 1-mile-wide crater and caused significant damage to the surrounding area.

3. The Washington State Capitol Building in Olympia was dedicated on August 13, 1928. The building features a dome that is 287 feet tall and is made of 750 tons of steel.

4. Patsy Bullitt Collins, a prominent philanthropist and environmentalist in the Pacific Northwest, was born on August 13, 1912, in Seattle. Collins was known for her efforts to protect the environment, including creating the Pacific Northwest Bird and Mammal Society.

5. The Everett Massacre occurred on November 5, 1916, but it is widely believed to have been planned and initiated on August 13 of that year. The violent confrontation between striking workers and law enforcement in Everett resulted in the deaths of five people and is considered a significant event in the history of labor relations in the United States.