High intensity rainfall between 12–14 January 2011 caused major flooding across much of the western and central parts of the Australian state of Victoria. Several follow-up heavy rainfall events including Tropical Low Yasi caused repeated flash flooding in affected areas in early February in many of the communities affected by January's floods.

Horsham is a regional city in the Wimmera region of western Victoria, Australia. Located on a bend in the Wimmera River, Horsham is approximately 300 kilometres (190 mi) northwest of the state capital Melbourne. As of the 2021 census, Horsham had a population of 20,429. It is the most populous city in Wimmera, and the main administrative centre for the Rural City of Horsham local government area. It is the eleventh largest city in Victoria after Melbourne, Geelong, Ballarat, Bendigo, Wodonga, Mildura, Shepparton, Warrnambool, Traralgon, and Wangaratta.