1997 Central European flood in Wrocław

The 1997 Central European flood in Wrocław, often referred to as the "Flood of the Millennium", devastated large parts of Wrocław, Poland, in July 1997. The flooding, primarily caused by the overflow of the Oder river and its tributaries, including the Bóbr, Bystrzyca, Kaczawa, Kwisa, Mała Panew, Eastern Neisse, Lusatian Neisse, Olza, Oława, Ślęza, and Widawa, inundated approximately 40% of Wrocław's urban area. The floodwaters entered the city on 12 July 1997 and receded by 6 August. The convergence of two flood waves from the Oder and Widawa, combined with the refusal of residents in the nearby village of Łany to allow controlled flooding of their area, exacerbated the damage in Wrocław.