In the 21st century, the city has tried to diversify its economic base to spur revitalization. The local economy has slowly transitioned toward services and healthcare. Major emphasis has been placed on Binghamton University, which built a downtown campus in 2007 and several student housing complexes. The increased downtown residential population and the university's plans to build additional student housing have spurred development of supporting businesses and a renewed focus on the riverfront. Unfortunately, two severe floods have stymied the recovery: While most of the impact of the Mid-Atlantic United States flood of 2006 was in the surrounding metropolitan area, the remnants of Tropical Storm Lee topped city flood walls in September 2011, causing $1 billion of damage in greater Binghamton.