2017 Bihar floods affected 19 districts of North Bihar causing death of 514 people . 2,371 panchayats ( settlement councils ) under 187 blocks of 19 districts of Northern Bihar have been affected in the flood . Around 1.71 crore ( 17.1 million ) people were hit by the floods . Over 8.5 lakhs of people have lost their homes , with Araria district alone accounting for 2.2 lakh homeless people . 2017 Flood has broken 9-Year record of deaths In Bihar . Bihar is India 's most flood-prone State , with 76 % of the population in the North Bihar living under the recurring threat of flood devastation . Devastating flood was caused due to excess heavy rainfall in monsoon season
9-Year record of deaths
2008 Bihar flood
2017 Bihar flood