The rising water level of the Punpun River has disrupted rail operations on the Patna-Gaya section. Due to increasing water pressure on a bridge located between kilometer 11/38-32 on the Patna-Parsa Down line since the night of September 4, ten MEMU trains between Patna and Gaya were canceled on Sunday. Railway officials stated that services would resume only after the water level normalizes and clearance is received from the engineering department.

Additionally, trains 18625 Purnia Court-Hatia Express and 18626 Hatia-Purnia Court Express, scheduled for September 6, will operate via an alternative route through Bakhtiyarpur-Kiul instead of Patna-Gaya. Railways have instructed continuous monitoring of the bridge and rail section.

The Punpun River is flowing 2.78 meters above its danger mark of 50.60 meters, leading to water entering several areas of Patna city. Many wards in Bakhtiyarpur's urban areas are also surrounded by water. On Saturday evening, the river's water level at Shripalpur was recorded at 53.380 meters, up from 53.16 meters on Friday. In Punpun market, the road from the river ghat to Arya Samaj Mandir is submerged under three to four feet of water. Lakhnapar, Barawan, Lakhna Uttar Paschim, Lakhna Purvi, Paimar, and Thumri panchayats are inundated. Connectivity to Lodipur, Dularpur, Sabalpur, Harek, Sapahua, and Yogapur villages in Lakhnapar panchayat has been cut off. The Chiniyabela-Sabalpur road is closed due to erosion at two places. Khainiya village in Bhagwanganj police station area has become an island. Flood-like conditions prevail in Dhanarua and Punpun blocks due to the Darhda and Punpun rivers, severely impacting paddy crops.

Roads leading to 12 villages in Punpun are submerged. Embankments at several locations, including Beldari Tola, have been damaged. The Road Construction Department claims that traffic is restored on most routes, with repair work ongoing in highly submerged areas.

In Maner, the rising waters of the Ganga and Sone rivers have put pressure on the Sone protection embankment, submerging the entire Maner Diara region. Approximately 60,000 people in Kita Chauhattar Purvi, Paschim, Madhya, Rampur Taufir Diara, Magarpal, and Suarmarwa panchayats are affected. About 800 people from Jangaliya Tola and Dumariya in Maner Nagar Parishad are also impacted. The spread of floodwaters in the Diara area over the past 10 days has halted employment, causing financial hardship for the poor and labor class. Three main routes connecting Diara villages to Maner city—Ramghat-Hulasi Tola, Rampur-Suarmarwa, and Maner-Haldichhapra—are submerged under about four feet of water. Anandpur panchayat in Bihta is also progressively getting surrounded by floodwaters.