Further rainfall and rising water levels are adding to the devastation caused by the worst floods in Pakistan for 80 years.
Rivers flowing from the north-west have begun to flood villages in the Punjab, the country’s most populated province and its agricultural breadbasket.
UNICEF says 50 thousand people have been displaced, while 200 thousand are being evacuted from Sindh province.
Tens of thousands remain cut off after the monsoon deluge swept away dozens of bridges in the Swat Valley.
They are still rebuilding after a major offensive against the Taliban last year.
The UN says three million people have been directly affected by the floods. At least 1400 people are known to have died.
The threats of new floods are hampering rescue efforts.
The Geneva-based Red Cross says more than 100 thousand people are at risk of disease and clean water is urgently needed.
Officials are warning that disease, not flood waters, could soon be the biggest killer around here.