While a third of Pakistan is now under water in heavy monsoon rains, the nation's biggest lake is threatening to flood densely populated areas.
Lake Manchar in Jamshoro district is on the verge of bursting its banks after attempts to controlled draining failed, The Guardian reported quoting an official.
Floods from heavy monsoon rains affected 33 million people killing 1,314, including 458 children, Pakistan's National Disaster Management Agency said.
In order to avoid greater catastrophe, officials on Sunday breached the lake despite knowing that draining could displace up to 100,000 people, while saving "densely populated areas from floods".
The attempts however were not working according to minister for irrigation Jam Khan Shoro as the water levels remained high.
The Prime Minister Shahbaz Sharif toured the area by helicopter to assess the damage in Sindh, according to the report.
Nearly 90 per cent of crops at the Sindh region that produces half of what Pakistan eats has been ruined after entire villages got swept away.
Satellite images showed a third of Pakistan under water that left more than 1.6 million homes damaged since mid-June, as per The Guardian report.
Two UNHCR planes landed in the southern port city of Karachi, the capital of Sindh province with aid and two more were reportedly expected later in the day.
UN children's agency, Unicef's representative Pakistan Abdullah Fadil said that floods have left children and families having no access to basic necessities of life.