The Pakistani Government says that the southern province of Sindh is now the worst-hit by devastating floods with 2.5 million people affected. New warnings are being issued and villagers are being evacuated. The World Health Organisation says health threats are increasing with cases of diahorea and malaria up sharply. Altogether, at least six million people in Pakistan are homeless and a fifth of the country is now under water. The overall flood situation in the country remains critical.