Bosnian Foreign Minister Zlatko Lagumdzija said more than 25 percent of his country's population has been affected by worst floods to hit the Balkans in living memory.
Lagumdzija said on May 19 that more than 1 million of Bosnia's 3.8 million people do not have access to clean water.
Tens of thousands of people across Bosnia, Croatia, and Serbia have evacuated their homes as flooding has hit a large part of the Balkans.
In Serbia workers and volunteers have been busy reinforcing river banks in several large cities, including Belgrade.
So far more than 40 have been killed in the Balkans since heavy rains started last week.
Compounding the problem, many hills are saturated from the rains causing more than 300 landslides, some in areas where there were still landmines from the 1992-1995 Balkan wars.
Based on reporting by AFP and dpa