NEW DELHI (BBC) -- Millions of people across South Asia have spent another night stranded in flood waters.

Almost 150 people have died and almost 20 million people have been displaced or marooned in severe flooding across India, Bangladesh and Nepal.
The floods are being described as the worst in living memory, according to BBC correspondents in the region.
Vast stretches of fertile countryside are under water, damaging farmland and flooding thousands of villages.
The relief operation is a massive challenge. Aid agencies say that stocks of food and water are running very low.
It has been raining heavily in the region for 20 days and more rain is forecast.
Weather experts are forecasting even heavier rains in the next few days, particularly in central India, a region which has so far received a weaker monsoon.
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Many of the rivers which flow through northern India and into Bangladesh are overflowing, and in some places they have burst their banks.
In Assam, in north-eastern India, three feet of rain fell in July.
The BBC's Damien Grammaticas in Delhi says that people in the state have clashed with police in their desperation for food, shelter and medicine.
In Uttar Pradesh the army was called in to evacuate 500 villages.
The two worst affected districts are reported to be Gorakhpur and Kushinagar, although water levels in major rivers there are reported to have stopped rising for the moment.
Bihar's State Disaster Management Committee Chairman Manoj Srivastava told the BBC that the flood situation was quite ""serious"".
At least 121 relief camps and 34 cattle camps had been set up in the flood-affected areas of Bihar, he said.
The High Court in the state capital Patna has recently criticized the state government for its failure to deliver relief materials.
Bihar's former Chief Minister and the current federal Railway Minister, Laloo Prasad Yadav, made an aerial tour of the region on Wednesday and accused the state government of ""criminal negligence"".
Chief Minister Nitish Kumar is out of the state on business.
State Governor RS Gavai has appealed to all party leaders to bury their political differences and work together to help flood victims.
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Many roads and bridges in the states of Bihar and Assam have been damaged making it harder for the authorities to get relief material to those affected.
More than 5 million people have been displaced in Bangladesh The army is using helicopters to drop supplies but aid agencies are already warning of shortages of food and drinking water.
In Bangladesh, a country that is predominantly low-lying, hundreds of thousands of people are camping on embankments or on the roofs of their homes waiting for relief.
One man who abandoned his home in Sirajganj, 110km (70 miles) north-west of Dhaka, said he and his family had lost everything.
""We are suffering too much here in this makeshift shelter. The flood has destroyed all of our belongings, we could save nothing,"" he told the BBC.
Many are using boats to move around.
Bangladesh's military-backed interim government has said it is doing its best to cope.
But, the BBC's John Sudworth in Dhaka says that the relief effort is piecemeal and not enough, consisting of a few biscuits and rice for each family.
In Nepal, several rivers that flow down from the Himalayas have burst their banks in the heavily populated and low-lying Terai region that borders Bihar and Uttar Pradesh.
The country's Red Cross says that a quarter of a million people have been affected by rains.
There have been deadly landslides in the highlands and floods have hit dozens of districts in the low-lying Terai region.
The weather is improving, but aid workers say that the problems for many of the affected people are getting worse.
The BBC's Mark Dummett in Kathmandu says that some people have blamed India for worsening the situation because it has not opened dams on its side of the border.
But authorities in the Indian state of Uttar Pradesh say that the release of flood waters by Nepal causes flooding on their side of the border.