In Bihar, water levels of various rivers are sharply increasing following heavy rain in catchment areas of Nepal.
Kosi, Bagmati and Gandak rivers are flowing above the danger mark.
New areas of Seemanchal and east parts of the state are engulfing with flood waters.
Discharge of over five lakh cusec water from Kosi and Gandak barrage has aggravated the situation.
So far, 12 people have been drowned in Purnia, Arariya and Katihar.
Chief Minister Nitish Kumar has instructed District Magistrates of flood affected districts to step-up relief and rescue operations.
