People fill sandbags to form a barricade along the Bosna River in the south and the Sava river in the north, in an attempt to prevent the two rivers from bursting their banks and meeting, during floods near Orasje, May 18, 2014. Russian cargo planes carrying boats, generators and food joined rescue teams from around Europe and thousands of local volunteers in evacuating people and building flood defences after the River Sava, swollen by days of torrential rain, burst its banks. In Bosnia, 19 people were confirmed dead. REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT)
A man waits to be rescued from his house during heavy floods in Vojskova May 19, 2014. More than a quarter of Bosnia's four million people have been affected by the worst floods to hit the Balkans in more than a century, the government said on Monday, warning of "terrifying" destruction comparable to the country's 1992-95 war. REUTERS/Srdjan Zivulovic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT)
A man paddles his boat past cars soaked in flood water in the town of Obrenovac, May 18, 2014. Soldiers, police and villagers battled to protect power plants in Serbia from rising flood waters on Sunday as the death toll from the Balkan region's worst rainfall in more than a century reached 37. Twelve bodies were recovered from the worst-hit Serbian town of Obrenovac, but the number was likely to rise as waters receded. REUTERS/Antonio Bronic (SERBIA - Tags: DISASTER ENVIRONMENT)