of this development cite urban sprawl, destruction of rare Carolinian zone forest and farm lands, replacement of distinctive regions by generic malls, and standard transportation and pollution concerns as major issues facing London. The City of London is currently the eleventh-largest urban area in Canada, eleventh-largest census metropolitan area in Canada, and the sixth-largest city in Ontario. Disasters On Victoria Day, 24 May 1881, the stern-wheeler ferry SS Victoria capsized in the Thames River close to Cove Bridge in West London. Approximately 200 passengers drowned in the shallow river, making it one of the worst disasters in London's history, and is now dubbed "The Victoria Day Disaster". At the time, London's population was relatively low; therefore it was hard to find a person in the city who did not have a family member affected by the tragedy. Two years later, on 12 July 1883, the first of the two most devastating floods in London's history killed 17 people. The second major flood, on 26 April 1937, destroyed more than a thousand houses across London, and caused over $50 million in damages, particularly in West London. On 3 January 1898, the floor of the assembly hall at London City Hall collapsed, killing 23 people and leaving more than 70 injured. Testimony at a coroner's inquest described the wooden beam under the floor as unsound, with knots and other defects reducing its strength by one fifth to one third. After repeated floods, the Upper Thames River Conservation Authority in 1953 built Fanshawe Dam on the North Thames to control the downstream rivers. Financing for this project came from the federal, provincial, and municipal governments. Other natural disasters include a 1984 tornado that led to damage on several streets in the White Oaks area of South London. On 11 December 2020, a partially-constructed apartment building just off of Wonderland Road in southwest London collapsed, killing two people and injuring at least four others. As late August 2021, the investigation is still ongoing. Geography The area was formed during the retreat of the glaciers during the last ice age, which produced areas of marshland, notably the Sifton Bog, as well as some of the most agriculturally productive areas of farmland in Ontario. The Thames River dominates London's geography. The North and South branches of the Thames River meet at the centre of the city, a location known as "The Forks" or "The Fork of