The monsoon is active across Bihar. Light rain brought relief from humidity. This was noted in Patna and other areas. The Meteorological Department forecasts light rain for Patna. Partial clouds are also expected in Patna. This is for the next 24 hours. A heavy rain warning is issued. This warning covers Gaya and Nawada. Araria’s Raniganj received the most rain. This information was updated on Monday, July 21, 2025. The update was at 08:53 AM (IST).

Patna Experiences Drizzle, Rain Alert for Many Regions

Drizzle was observed in the capital. This provided relief from the humidity. A thunderstorm and rain alert is issued. This alert covers most parts today.

Monsoon Activity Across Bihar

The monsoon remains active in Bihar. Scattered rainfall occurred on Sunday. This was seen in Patna and surrounding areas. Bhagalpur, Purnia, and Valmiki Nagar saw rain. Forbesganj, Bhojpur, Begusarai, and Munger also had rain. Intermittent rain in the capital brought relief. It eased the humidity.

Weather Forecast for Patna and Beyond

The Patna Meteorological Center states a forecast. Patna and nearby areas will have partial clouds. Light rain is possible in some places. This is for the next 24 hours. A heavy rain warning is issued. This warning is for Gaya and Nawada districts. It includes thunder and strong winds. Most parts of the state may experience these. Lightning is also a risk.

Rainfall Data: Raniganj Leads

In the last 24 hours, Raniganj received significant rain. Araria’s Raniganj recorded 160.0 mm of rainfall. This was the highest. Patna recorded 0.6 mm of rain on Sunday. The maximum temperature in Patna was 32.0 degrees Celsius. Gopalganj recorded the highest maximum temperature. It was 36.2 degrees Celsius.

Rainfall in Key Cities (in mm)

Lakhisarai: 145.6 Khagaria: 134.6 Gaya: 128.6 Purnia: 122.8 Banka: 117.0 Bhagalpur: 107.4 Begusarai: 98.2 Nalanda: 90.8 Kishanganj: 82.4

Temperatures in Major Cities (in Celsius)

Patna: Max 32.0, Min 29.1 Gaya: Max 32.2, Min 25.4 Bhagalpur: Max 29.2, Min 25.7 Muzaffarpur: Max 31.4, Min 29.1

River Erosion in Rohtas Due to Son River Floods

The Son River’s floods cause erosion. This affects the riparian areas in Rohtas. Agricultural land is rapidly eroding. Dozens of acres disappear each year. Villages along the river are impacted. This year’s floods intensified erosion. The Son’s strong current caused significant damage. Areas like Belauja, Singhpur, and Bandu are affected. Rasulpur and Kamranjanj are also hit. This also includes Nauhatta, Rohtas, and Tilouthu blocks. Dehri block also saw erosion. Dozens of acres of private land eroded. This has deeply worried farmers.

Lack of Erosion Control Measures

No erosion control work has been done. The Water Resources Department has not acted. This is over the past seven years. Erosion has increased every year. The Son River widens in many places. It expands by five to ten feet. This is along 80 kilometers. It stretches from Yadunathpur to Dehri. Farmers’ private land is submerged. Over 1,000 acres of land eroded since 2003. This happened in Bandu, Tiyara, and Kamranjanj. Rasulpur and other villages also suffered. Revenue departments still collect land tax. This is from farmers whose land is gone.

Village Threatened by Erosion

Bandu village was once 300 meters from the Son River. Erosion has reduced this distance. Now, only ten meters remain. The Water Resources Department acted. They worked to save Bandu village. This was in 2006 and 2018. Boulder pitching and geo-bags were used. These were anti-erosion measures. In 2016, the Koel River formed a new channel. This was near Bandu village. If the new channel became permanent, Bandu village would vanish. The erosion near this village is severe. It threatens fifteen nearby villages. These include Daranagar, Bhadara, Khairwa, and Sheikhpura. Singhpur is also at risk.

Impact on Other Villages and River Confluence

Other villages face the Son River’s impact. Yadunathpur, Matianw, and Nawadih Kalan are affected. Amhua, Nawadih Khurd, and Tiara Kalan are also at risk. Tiara Khurd, Parchha, Panduka, and Padaria face issues. Tiura, Nauhatta, and Ulli are also seeing changes. The Koel River meets the Son River. This confluence is near Bandu village. The meeting point causes severe erosion. The Koel River’s current is very strong. It combines with the Son River. This causes intense erosion in Bandu. Bhadara, Daranagar, Belauja, and Singhpur are also affected. Baliari also experiences high erosion.

Demands for Erosion Control

In 2017, former MLA Lalan Paswan made a demand. He urged the Water Resources Department to act. This was to stop the erosion. Anti-erosion work was done near Rasulpur village. This was on the Son riverbank in 2018. However, no new projects have been undertaken. This is across both blocks recently. The situation is becoming severe. Former chief Kameshwar Singh, a Rasulpur resident, stated this. He noted that about ten acres of land are lost this year. This land belongs to several farmers. He warns of farmers becoming landless. This will happen without erosion control measures.