IMD Red Alert: Extremely Heavy Rainfall Forecast for Sub-Himalayan Bengal & Sikkim

The India Meteorological Department (IMD) has issued a red alert warning of very heavy to extremely heavy rainfall over Sub-Himalayan West Bengal and Sikkim. The forecast is valid until June 22, 2026, with the possibility of floods, landslides, and transport disruptions in the affected regions. The IMD has also indicated that Northeast India will continue to experience persistent rain spells through June 25, 2026, as the southwest monsoon strengthens.

IMD Red Alert: Extremely Heavy Rainfall Forecast for Sub-Himalayan Bengal & Sikkim
IMD Red Alert: Extremely Heavy Rainfall Forecast for Sub-Himalayan Bengal & Sikkim

The regions most at risk include Darjeeling, Jalpaiguri, Kalimpong, Alipurduar, and Cooch Behar in West Bengal, along with hilly areas of Sikkim. Rainfall intensity is expected to range from very heavy (7–20 cm) to extremely heavy (>20 cm), driven by strong monsoon currents pulling moisture from the Bay of Bengal.

Authorities have warned of flooding in rivers such as Teesta and Balasan, which are already in spate, raising concerns for low-lying areas. Landslides remain a major risk in the hilly terrain of Darjeeling, Kalimpong, and Sikkim, while towns like Siliguri and Gangtok may face urban waterlogging. Transport services, including roads, railways, and flights, could see delays or cancellations.

Residents have been advised to avoid non-essential travel, stay indoors during heavy spells, and keep emergency supplies ready. Local administrations are preparing for possible evacuations and relief operations, while communication disruptions such as power cuts and mobile outages are also anticipated.

This surge in rainfall comes as the southwest monsoon regains strength after a brief slowdown, improving distribution across eastern and northeastern India. Interestingly, while these regions brace for floods, heatwave conditions continue in parts of Konkan, Goa, Madhya Maharashtra, and East Uttar Pradesh, highlighting the contrasting weather extremes across the country.