Rivers are flowing above the danger mark in Patna, Buxar, Bhagalpur, Ara, Chhapra and Gopalganj districts and are likely to rise further, posing threat to people living in low-lying areas. Though the flood threat looms large over Patna as the Ganga was flowing above the danger mark, state Water Resources Minister Vijay Kumar Choudhary said there was no need to panic.