Bihar, Sikkim Flash Flood Risk Flagged; Rain Eases in Bengal: IMD

IMD has flagged a low-to-moderate flash flood risk in East Champaran and Sitamarhi districts of Bihar, and in Mangan, Gangtok, Gyalshing and Soreng in Sikkim and Darjeeling in north Bengal, valid until 11:30 am IST on 31 October. The warning is in IMD’s 30 October bulletin, issued after Bihar, Jharkhand and Gangetic West Bengal had fairly widespread to widespread rain on 30 October. From 31 October, IMD expects only isolated to scattered rain over Bihar, Jharkhand and Gangetic Bengal through 5 November.

Light Showers Ahead for Kolkata and South Bengal

The Regional Meteorological Centre in Kolkata said in a special bulletin at 1 pm on 30 October that no weather warning was in force for West Bengal. For 31 October to the morning of 1 November it expects light to moderate rain or thundershowers at a few places in Kolkata, North and South 24 Parganas, East Midnapore, Birbhum, Murshidabad and Nadia. Dry weather is most likely from 4 to 6 November.

North Bengal remains wetter. Heavy rain of 7-11 cm was very likely at one or two places in Darjeeling, Kalimpong, Jalpaiguri and Alipurduar until the morning of 31 October, and the bulletin lists landslide risk in the Darjeeling and Kalimpong hills.

Also read Bihar, Jharkhand Rain Alert for Oct 28-31 as Cyclone Arnab Nears

Odisha Faces Gusts of 60 kmph Until 3 November

IMD forecasts thunderstorms with winds of 40-50 km/h, gusting to 60 km/h, over Odisha from 30 October to 3 November. Fairly widespread rain is likely on 1 November and isolated heavy rain on 2 November. Outlook, citing The New Indian Express, reported isolated heavy rain on 1 November in Rayagada, Koraput, Malkangiri, Gajapati and Ganjam. CareerIndia listed yellow thunderstorm alerts for Baleshwar, Bhadrak, Kendrapada, Jagatsinghpur, Khordha and Ganjam.

After 12-20 cm in a Day

Odisha recorded heavy to very heavy rain of 12-20 cm in the 24 hours to 8:30 am on 30 October, with Bhogorai the highest at 19 cm. Digha in Bengal and Daltonganj in Jharkhand logged 8 cm each. IPB News reported the alerts for Bihar, Odisha and Bengal on 30 October. Bihar’s rain-affected districts can follow the Weather Updates page for later bulletins.

Source: IMD press release, 30 October 2026 and RMC Kolkata special bulletin. Also based on reporting by CareerIndia and Outlook.

Image: iStock.