The 2010 Slovenia floods, on the weekend of 17–19 September 2010, were caused by heavy rains in Slovenia, resulting in one of the worst floods in the country's history. Among the regions affected were the capital Ljubljana, the Zasavje region, Laško, the Slovenian Littoral and the Lower Carniola region. Initial damage was estimated to reach €15 million. Three people were killed.
In Ljubljana, the river Gradaščica – together with the Mali graben stream – flooded several parts of the Vič District, and record water levels were reached. Several transformers were shut down to prevent accidents, leaving some 3,000 people without electricity.