Photo: Wojciech Olkusniki/East News City of Wroclaw is being prepared for the incoming flood wave on the Odra (Oder) river and its tributaries on September 18, 2024 in south-western Poland. Heavy rains brought by the storm Boris caused severe flooding in southern Poland. Pictured: high levels of water in Bystrzyca river (Odra's tributary) close to the Wroclaw's sewage treatment plant "Janowek".