Sentinel tree SequoiaSept. 9, 1775: A hurricane strikes Newfoundland’s Avalon Peninsula. In what is still considered Canada’s worst weather disaster, at least 4,000 die — many of them fishermen or Royal Navy sailors assigned to North America during the American Revolution.

Sept. 9, 1890: Sequoia National Park is established in California. It is home to some of the largest trees on earth.

Sept. 9, 1998: Keiko, the orca whale that was captured off Iceland, displayed in a tank at marine parks in Canada and Mexico, then “liberated” with a flight to a better-equipped aquarium in Oregon, is flown back to Iceland as part of an intensive plan to reintroduce him to the wild. Keiko inspires worldwide support and a fictionalized box office hit, "Free Willy," but the release plan does not go well. Keiko beaches himself and dies in 2003.

Sept. 9, 2011:  Heavy rains from back-to-back tropical storms bring record flooding to the Susquehanna River, prompting 75,000 people to evacuate.  After flooding from Hurricane Agnes brought major destruction to Wilkes-Barre and other riverside towns in 1972, a flood-control levee thought to be un-toppable was built.  This year, it was topped.

Photo: mikebaird/Flickr

This feature is compiled by Peter Dykstra, an MNN contributor and publisher of Environmental Health News and The Daily Climate.