ISLAMABAD   -  Water inflow in major rivers has further surged to 335,600 cusecs due to shooting up mercury level in the northern areas. According to Indus River System Authority (Irsa) on Tuesday, water inflow stood at 335,600 cusecs against outflow of 254,500 cusecs. According to the data released by Irsa, water level in the Indus River at Tarbela Dam was 1425.27 feet, which was 44.27 feet higher than its dead level 1386 feet. Water inflow and outflow in the dam was recorded as 151,400 and 100,000 cusecs respectively.