DADU (Reuters) Six weeks after the start of devastating floods, waters pouring into a lake in Sindh are threatening several towns and forcing tens of thousands of people to flee, officials said on Monday. As floodwaters make their way to the Arabian Sea, new towns in Sindh province are being inundated as embankments constructed to protect cities and towns in the traditional flood plains are now channelling water into new areas, including Lake Manchar. Tens of thousands of people have fled towns in the Dadu district, and officials said more were asked to leave after water, flowing from a breached embankment, reached a dangerous point in the lake, countrys largest freshwater lake. Our entire concentration is now on Dadu district as the water is just a few inches from overtopping the Manchar Lake that could threaten many towns, Additional Relief Commissioner, Riaz Ahmed Soomro, told Reuters. Officials say several towns around the lake including Bhon and Jhingira are in danger of inundation, threatening an estimated 250,000 people. All my seven brothers and their families are now dependent on me as they are all farmers and floods have washed away their lands and crops, said Abdul Ghani, a school teacher, whose village upstream from Manchar Lake has already flooded.