The water level in Indus river has soared at Guddu Barrage, sources said.
The people from the areas under flood threat were moving to safer places.
The violent waves of Chenab after drowning large swathes of land in Muzaffargarh tehsil, are now posing a threat to rural areas of Jatoi and Alipur tehsils in Muzaffargarh district.
The water flow at Panjnad headworks in Bahawalpur district was rising, but the discharge of 413,000 cusecs on Monday night was stated to be within manageable limits.
According to sources at Flood Forecasting Division (FFD) there will be a maximum flood of about 500,000 cusecs in Indus that will pass through Guddu and Sukkur barrages.
The danger of high flood at Guddu and Sukkur had subsided after dykes were breached between Qadirabad and Panjnad, an official said. The designed capacities of the two barrages were 1.2 million and 900,000 cusecs respectively, the flow of 500,000 cusecs, and even more, would not be a problem, he added.
The Trimu barrage in Jhang district, which saw a peak of 600,000 cusecs, was now in low flood of 150,000 cusecs.