A flood-damaged Opel Astra is seen in Topcic Polje, May 20, 2014. At least 40 people have died in Serbia, Bosnia and Croatia, after days of the heaviest rainfall since records began 120 years ago caused rivers to burst their banks and triggered hundreds of landslides. REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT) 

Fata Kovacevic reacts near her flood-damaged house in Topcic Polje, May 20, 2014. At least 40 people have died in Serbia, Bosnia and Croatia, after days of the heaviest rainfall since records began 120 years ago caused rivers to burst their banks and triggered hundreds of landslides. REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT) 

People dig out a car buried after floods and landslides in Topcic Polje, May 20, 2014. At least 40 people have died in Serbia, Bosnia and Croatia, after days of the heaviest rainfall since records began 120 years ago caused rivers to burst their banks and triggered hundreds of landslides. REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT TPX IMAGES OF THE DAY) 

A dog sits on a flood-damaged basketball court in Topcic Polje, May 20, 2014. At least 40 people have died in Serbia, Bosnia and Croatia, after days of the heaviest rainfall since records began 120 years ago caused rivers to burst their banks and triggered hundreds of landslides. REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT ANIMALS) 

People carry food received from humanitarian organizations in Topcic Polje, May 20, 2014. At least 40 people have died in Serbia, Bosnia and Croatia, after days of the heaviest rainfall since records began 120 years ago caused rivers to burst their banks and triggered hundreds of landslides. REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT TPX IMAGES OF THE DAY) 

Ervin Cosic poses on top of his flood damaged house in Topcic Polje, May 20, 2014. At least 40 people have died in Serbia, Bosnia and Croatia, after days of the heaviest rainfall since records began 120 years ago caused rivers to burst their banks and triggered hundreds of landslides. REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT TPX IMAGES OF THE DAY) 

A veterinarian places a dead deer along with drowned pigs in a boat for disinfection, during heavy floods in the village of Prud, May 20, 2014. Communities in Serbia and Bosnia battled to protect towns and power plants on Monday from rising flood waters and landslides that have devastated swathes of both countries and killed dozens of people. REUTERS/Srdjan Zivulovic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT ANIMALS) 

A veterinarian disinfects the body of a drowned pig during heavy floods in the village of Prud, May 20, 2014. Communities in Serbia and Bosnia battled to protect towns and power plants on Monday from rising flood waters and landslides that have devastated swathes of both countries and killed dozens of people. REUTERS/Srdjan Zivulovic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT ANIMALS) 

A Slovenian Civil Protection rescue worker saves a dog during heavy floods in the village of Prud May 20, 2014. Communities in Serbia and Bosnia battled to protect towns and power plants on Monday from rising flood waters and landslides that have devastated swathes of both countries and killed dozens of people. REUTERS/Srdjan Zivulovic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT ANIMALS TPX IMAGES OF THE DAY) 

Sheep are seen on the terrace of a flooded house in Obrenovac, southwest of Belgrade, May 20, 2014. Soldiers and energy workers stacked thousands of sandbags overnight to protect Serbia's biggest power plant from flood waters expected to keep rising after the heaviest rains in the Balkans in more than a century killed dozens of people. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT ANIMALS) 

A religious statue is seen in front of a flooded house in Obrenovac, southwest of Belgrade, May 20, 2014. Soldiers and energy workers stacked thousands of sandbags overnight to protect Serbia's biggest power plant from flood waters expected to keep rising after the heaviest rains in the Balkans in more than a century killed dozens of people. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT RELIGION) 

Volunteers prepare food for people affected by floods in the town of Smedarevska Palanka, southeast of Belgrade, May 20, 2014. Soldiers and energy workers stacked thousands of sandbags overnight to protect Serbia's biggest power plant from flood waters expected to keep rising after the heaviest rains in the Balkans in more than a century killed dozens of people. REUTERS/Antonio Bronic (SERBIA - Tags: DISASTER ENVIRONMENT) 

A woman waves from a window during heavy floods in Bosanski Samac May 19, 2014. Bosnia said on Monday that more than a quarter of its 4 million people had been affected by the worst floods to hit the Balkans in living memory, comparing the "terrifying" destruction to that of the country's 1992-95 war. The extent of the devastation became apparent in Serbia too, as waters receded in some of the worst-hit areas to reveal homes toppled or submerged in mud, trees felled and villages strewn with the rotting corpses of livestock. REUTERS/Srdjan Zivulovic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT TPX IMAGES OF THE DAY) 

A man climbs on the balcony of his house during heavy floods in Bosanski Samac May 19, 2014. Bosnia said on Monday that more than a quarter of its 4 million people had been affected by the worst floods to hit the Balkans in living memory, comparing the "terrifying" destruction to that of the country's 1992-95 war. The extent of the devastation became apparent in Serbia too, as waters receded in some of the worst-hit areas to reveal homes toppled or submerged in mud, trees felled and villages strewn with the rotting corpses of livestock. REUTERS/Srdjan Zivulovic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT) 

A woman throws away water as she dries clothes during heavy floods in Bosanski Samac May 19, 2014. Bosnia said on Monday that more than a quarter of its 4 million people had been affected by the worst floods to hit the Balkans in living memory, comparing the "terrifying" destruction to that of the country's 1992-95 war. The extent of the devastation became apparent in Serbia too, as waters receded in some of the worst-hit areas to reveal homes toppled or submerged in mud, trees felled and villages strewn with the rotting corpses of livestock. REUTERS/Srdjan Zivulovic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT) 

A woman looks for clothes among a donated pile during heavy floods in Bosanski Samac May 19, 2014. Bosnia said on Monday that more than a quarter of its 4 million people had been affected by the worst floods to hit the Balkans in living memory, comparing the "terrifying" destruction to that of the country's 1992-95 war. The extent of the devastation became apparent in Serbia too, as waters receded in some of the worst-hit areas to reveal homes toppled or submerged in mud, trees felled and villages strewn with the rotting corpses of livestock. REUTERS/Srdjan Zivulovic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT) 

A man climbs on the roof of a house to feed pigs they rescued during heavy floods in the village of Vojskova, May 19, 2014. Communities in Serbia and Bosnia battled to protect towns and power plants on Monday from rising flood waters and landslides that have devastated swathes of both countries and killed dozens of people. REUTERS/Srdjan Zivulovic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT SOCIETY ANIMALS TPX IMAGES OF THE DAY) 

A man waits for transportation next to a damaged boat, during heavy floods in the village of Vojskova, May 19, 2014. Communities in Serbia and Bosnia battled to protect towns and power plants on Monday from rising flood waters and landslides that have devastated swathes of both countries and killed dozens of people. REUTERS/Srdjan Zivulovic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT SOCIETY) 

A man waits to be rescued from his house during heavy floods in the village of Vojskova, May 19, 2014. Communities in Serbia and Bosnia battled to protect towns and power plants on Monday from rising flood waters and landslides that have devastated swathes of both countries and killed dozens of people. REUTERS/Srdjan Zivulovic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT SOCIETY) 

A car passes by a destroyed road caused by floods near the village of Krupanj, west from Belgrade May 19, 2014. Communities in Serbia and Bosnia battled to protect towns and power plants on Monday from rising flood waters and landslides that have devastated swathes of both countries and killed dozens of people. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT TRANSPORT) 

A man reacts near a house tilted by floods in the village of Krupanj, west from Belgrade, May 19, 2014. Communities in Serbia and Bosnia battled to protect towns and power plants on Monday from rising flood waters and landslides that have devastated swathes of both countries and killed dozens of people. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT TPX IMAGES OF THE DAY) 

A woman weeps while sitting on the remains of her destroyed home in the village of Krupanj, west from Belgrade, May 19, 2014. Communities in Serbia and Bosnia battled to protect towns and power plants on Monday from rising flood waters and landslides that have devastated swathes of both countries and killed dozens of people. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT) 

Local people travel on a boat in the flooded town of Obrenovac, southwest of Belgrade, May 19, 2014. Communities in Serbia and Bosnia battled to protect towns and power plants on Monday from rising flood waters and landslides that have devastated swathes of both countries and killed dozens of people. REUTERS/Antonio Bronic (SERBIA - Tags: DISASTER ENVIRONMENT) 

A man makes coffee on a balcony in the flooded town of Obrenovac, southwest of Belgrade, May 19, 2014. Soldiers and energy workers stacked thousands of sandbags overnight to protect Serbia's biggest power plant from flood waters expected to keep rising after the heaviest rains in the Balkans in more than a century killed dozens of people. REUTERS/Antonio Bronic (SERBIA - Tags: DISASTER ENVIRONMENT) 

Serbian army soldiers drive through the flood waters in the town of Obrenovac, southwest of Belgrade, May 19, 2014. Soldiers and energy workers stacked thousands of sandbags overnight to protect Serbia's biggest power plant from flood waters expected to keep rising after the heaviest rains in the Balkans in more than a century killed dozens of people. REUTERS/Antonio Bronic (SERBIA - Tags: DISASTER ENVIRONMENT MILITARY) 

A damaged electronic shop is seen in the flooded town of Obrenovac, southwest of Belgrade, May 19, 2014. Soldiers and energy workers stacked thousands of sandbags overnight to protect Serbia's biggest power plant from flood waters expected to keep rising after the heaviest rains in the Balkans in more than a century killed dozens of people. REUTERS/Antonio Bronic (SERBIA - Tags: DISASTER ENVIRONMENT) 

Evacuees from the Serbian town of Obrenovac are seen lying on beds in a shelter hall in Belgrade, May 18, 2014. Two Russian cargo planes carrying food, generators and rescue boats land in Serbia as part of a relief effort after the worst floods in over a century kill more than 20 people in the Balkans. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT) 

An evacuee from the Serbian town of Obrenovac reads a newspaper in a shelter hall in Belgrade, May 18, 2014. Two Russian cargo planes carrying food, generators and rescue boats land in Serbia as part of a relief effort after the worst floods in over a century kill more than 20 people in the Balkans. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT TPX IMAGES OF THE DAY) 

Children's shoes donated to evacuated people from the Serbian town of Obrenovac are seen in a shelter hall in Belgrade, May 18, 2014. Two Russian cargo planes carrying food, generators and rescue boats land in Serbia as part of a relief effort after the worst floods in over a century kill more than 20 people in the Balkans. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT) 

Serbian army soldiers evacuate people in an amphibious vehicle in the flooded town of Obrenovac, southwest of Belgrade, Serbia May 17, 2014. Emergency services pulled seven dead bodies from flooded homes in Bosnia on Saturday and soldiers rushed to free hundreds of people stranded in a school in Serbia during the worst floods to hit the Balkans in over a century. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT MILITARY) 

People receive food from Serbian army soldiers in the flooded town of Obrenovac, southwest of Belgrade May 17, 2014. Seven bodies were pulled from flooded homes in Bosnia and the army rushed to free hundreds of people stranded in a school in Serbia on Saturday during the worst floods to hit the Balkans in over a century. REUTERS/Marko Djurica (SERBIA - Tags: MILITARY DISASTER ENVIRONMENT FOOD SOCIETY) 

People evacuate on a boat in the flooded town of Obrenovac, southwest of Belgrade, Serbia May 17, 2014. Emergency services pulled seven dead bodies from flooded homes in Bosnia on Saturday and soldiers rushed to free hundreds of people stranded in a school in Serbia during the worst floods to hit the Balkans in over a century. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT) 

People try to help an injured man in the flooded town of Obrenovac, southwest of Belgrade May 17, 2014. Seven bodies were pulled from flooded homes in Bosnia and the army rushed to free hundreds of people stranded in a school in Serbia on Saturday during the worst floods to hit the Balkans in over a century. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT) 

An aerial view of a flooded orchard near city of Brcko, May 18, 2014. Russian cargo planes and rescue teams from around Europe on Sunday joined huge volunteer aid efforts in swathes of Serbia and Bosnia where at least 24 people have died in the worst floods in over a century. REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT) 

An aerial view of the flooded city of Brcko, May 18, 2014. Russian cargo planes and rescue teams from around Europe on Sunday joined huge volunteer aid efforts in swathes of Serbia and Bosnia where at least 24 people have died in the worst floods in over a century. REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT TPX IMAGES OF THE DAY) 

A member of the Armed Forces of Bosnia and Herzegovina views the flooded city of Gracanica May 18, 2014. Russian cargo planes and rescue teams from around Europe on Sunday joined huge volunteer aid efforts in swathes of Serbia and Bosnia where at least 24 people have died in the worst floods in over a century. REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT MILITARY) 

A man smoking a cigarette, sits on sandbags he helped to pack, which will be used to shore up barricades 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 woman and her son move away from the downwash of an European Union Force (EUFOR) helicopter after being rescued from the flooded Serici village near Zepce, at a heliport in the central Bosnian town of Zenica, May 17, 2014. More than 20 people have been killed in the worst floods in more than a century in Serbia and Bosnia, authorities said on Saturday, with thousands evacuated from towns still under threat from rising rivers. REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT MILITARY TRANSPORT) 

A Serbian army soldier evacuates a child from a school in the flooded town of Obrenovac, southwest of Belgrade, Serbia May 17, 2014. Emergency services pulled seven dead bodies from flooded homes in Bosnia on Saturday and soldiers rushed to free hundreds of people stranded in a school in Serbia during the worst floods to hit the Balkans in over a century. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT MILITARY EDUCATION TPX IMAGES OF THE DAY) 

Serbian army soldiers evacuate a boy from a flooded house in the town of Obrenovac, southwest of Belgrade, May 17, 2014. Emergency services pulled seven dead bodies from flooded homes in Bosnia on Saturday and soldiers rushed to free hundreds of people stranded in a school in Serbia during the worst floods to hit the Balkans in over a century. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT MILITARY) 

Serbian army soldiers evacuate a boy from a flooded house in the town of Obrenovac, southwest of Belgrade, May 17, 2014. Emergency services pulled seven dead bodies from flooded homes in Bosnia on Saturday and soldiers rushed to free hundreds of people stranded in a school in Serbia during the worst floods to hit the Balkans in over a century. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT MILITARY TPX IMAGES OF THE DAY) 

A woman and her children arrive by European Union Force (EUFOR) helicopter after being rescued from the flooded Serici village near Zepce, at a heliport in the central Bosnian town of Zenica, May 17, 2014. More than 20 people have been killed in the worst floods in more than a century in Serbia and Bosnia, authorities said on Saturday, with thousands evacuated from towns still under threat from rising rivers. REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT TRANSPORT MILITARY) 

Serbian army soldiers evacuate an injured man in the flooded town of Obrenovac, southwest of Belgrade, Serbia May 17, 2014. Emergency services pulled seven dead bodies from flooded homes in Bosnia on Saturday and soldiers rushed to free hundreds of people stranded in a school in Serbia during the worst floods to hit the Balkans in over a century. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT MILITARY) 

Serbian army soldiers evacuate an injured man in the flooded town of Obrenovac, southwest of Belgrade, Serbia May 17, 2014. Emergency services pulled seven dead bodies from flooded homes in Bosnia on Saturday and soldiers rushed to free hundreds of people stranded in a school in Serbia during the worst floods to hit the Balkans in over a century. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT MILITARY) 

Serbian army soldiers evacuate people in an amphibious vehicle in the flooded town of Obrenovac, southwest of Belgrade, Serbia May 17, 2014. Emergency services pulled seven dead bodies from flooded homes in Bosnia on Saturday and soldiers rushed to free hundreds of people stranded in a school in Serbia during the worst floods to hit the Balkans in over a century. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT MILITARY) 

A Serbian rows a boat past flooded ambulance vehicles in the flooded town of Obrenovac, southwest of Belgrade, Serbia May 17, 2014. Emergency services pulled seven dead bodies from flooded homes in Bosnia on Saturday and soldiers rushed to free hundreds of people stranded in a school in Serbia during the worst floods to hit the Balkans in over a century. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT MILITARY) 

Cars are seen on a street in the flooded town of Obrenovac, southwest of Belgrade, Serbia May 17, 2014. Emergency services pulled seven dead bodies from flooded homes in Bosnia on Saturday and soldiers rushed to free hundreds of people stranded in a school in Serbia during the worst floods to hit the Balkans in over a century. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT) 

A Serbian army soldier evacuates a child from a school in the flooded town of Obrenovac, southwest of Belgrade, Serbia May 17, 2014. Emergency services pulled seven dead bodies from flooded homes in Bosnia on Saturday and soldiers rushed to free hundreds of people stranded in a school in Serbia during the worst floods to hit the Balkans in over a century. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT MILITARY EDUCATION) 

People receive food aid from a rescue team after floods in Maglaj, May 16, 2014. The heaviest rains and floods in 120 years have hit Bosnia and Serbia, killing five people, forcing hundreds out of their homes and cutting off entire towns. Army helicopters evacuated dozens of people stranded on the top floors of their flooded homes in the central town of Maglaj, where the Bosna river swelled to record levels and swept away the main bridge. Rescuers used boats to reach stranded victims. REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT SOCIETY FOOD) 

A Serbian army soldier rows a boat as he searches for people to be evacuated in the town of Obrenovac, southwest of Belgrade, May 16, 2014. The heaviest rains and floods in 120 years have hit Bosnia and Serbia, killing five people, forcing hundreds out of their homes and cutting off entire towns. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT MILITARY) 

Serbian army soldiers evacuate a woman from a flooded house in the town of Obrenovac, southwest of Belgrade, May 16, 2014. The heaviest rains and floods in 120 years have hit Bosnia and Serbia, killing five people, forcing hundreds out of their homes and cutting off entire towns. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT MILITARY) 

A member of the rescue team carries a women as they leave her flooded house in Topcic Polje, near Zepce May 16, 2014. The heaviest rains and floods in 120 years have hit Bosnia and Serbia, killing five people, forcing hundreds out of their homes and cutting off entire towns. REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT) 

Serbian army soldiers evacuate people from a flooded house in the town of Obrenovac, southwest of Belgrade May 16, 2014. The heaviest rains and floods in 120 years have hit Bosnia and Serbia, killing five people, forcing hundreds out of their homes and cutting off entire towns. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT MILITARY) 

A woman cries after being evacuated from her flooded house in the town of Obrenovac, southwest of Belgrade, May 16, 2014. The heaviest rains and floods in 120 years have hit Bosnia and Serbia, killing five people, forcing hundreds out of their homes and cutting off entire towns. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT) 

People stand on a terrace of their flooded house as the wait to be evacuated in the town of Obrenovac, southwest of Belgrade May 16, 2014. The heaviest rains and floods in 120 years have hit Bosnia and Serbia, killing five people, forcing hundreds out of their homes and cutting off entire towns. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT TPX IMAGES OF THE DAY) 

People are carried by a front loader as they evacuate from their flooded houses in Topcic Polje, near Zepce May 16, 2014. The heaviest rains and floods in 120 years have hit Bosnia and Serbia, killing five people, forcing hundreds out of their homes and cutting off entire towns. REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT TPX IMAGES OF THE DAY) 

Asim Skopljak walks on a street that was hit by floods in Topcic Polje, near Zepce May 16, 2014. The heaviest rains and floods in 120 years have hit Bosnia and Serbia, killing five people, forcing hundreds out of their homes and cutting off entire towns. REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINA - Tags: DISASTER ENVIRONMENT TPX IMAGES OF THE DAY) 

People look out from their apartments as they wait to be evacuated in the town of Obrenovac, southwest of Belgrade May 16, 2014. The heaviest rains and floods in 120 years have hit Bosnia and Serbia, killing five people, forcing hundreds out of their homes and cutting off entire towns. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT) 

Serbian army soldiers evacuate people from a flooded house in the town of Obrenovac, southwest of Belgrade May 16, 2014. The heaviest rains and floods in 120 years have hit Bosnia and Serbia, killing five people, forcing hundreds out of their homes and cutting off entire towns. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT MILITARY) 

People sit in a boat after being evacuated by Serbian army soldiers from their houses in the town of Obrenovac, southwest of Belgrade May 16, 2014. The heaviest rains and floods in 120 years have hit Bosnia and Serbia, killing five people, forcing hundreds out of their homes and cutting off entire towns. REUTERS/Marko Djurica (SERBIA - Tags: DISASTER ENVIRONMENT)