Weathermen have predicted downpour for at least two to three days after heavy rain lashed the state capital since Saturday.

The India Meteorological Department (IMD) recorded 64.8mm rain between Saturday 8.30am and Sunday 5.30pm.

D.C. Gupta, the IMD director, told The Telegraph: “Monsoon is strong in Bihar because of its trough line passing through the state. A cyclonic circulation is prevailing over east Uttar Pradesh and the adjoining districts in Bihar extending up to 1.5km above sea level. In the next 48 hours, rainfall accompanied by thundershower is likely to occur at most places over the state.”

The downpour started around 8.30pm on Saturday and continued throughout the night. The intensity of the rain increased on Sunday morning. The rain stopped only around 3.30pm on Sunday. However, the drizzle continued and the thick cloud cover remained.

The evening bulletin of IMD, Delhi, stated that the southwest monsoon was active over Bihar, Assam, Meghalaya, Arunachal Pradesh, Andaman and Nicobar Islands, and the Telangana region. The western end of monsoon trough was running close to the foothills of Himalayas and its eastern end was passing through Bahraich (UP), Patna, Shantiniketan (Bengal) and southeastwards to east central Bay of Bengal.

Weather scientists claimed that the monsoon would be active in Bihar for at least three more days. Abdus Sattar, assistant professor of meteorology, Rajendra Agriculture University, Pusa, Samastipur, said: “The overall monsoon rainfall deficiency in Bihar is around 25 per cent. If the prevailing conditions prevail, the deficiency would come down fast.”