Heavy Rainfall Alert for North Bengal, Sikkim

The Regional Meteorological Centre, Kolkata (IMD) has issued a Flash Flood Guidance Bulletin warning of heavy to very heavy rainfall across Sub-Himalayan West Bengal and Sikkim for July 19-20, 2026, with a “Low to Moderate” flash flood risk over the next 24 hours. The IMD’s broader forecast confirms this pattern, having sounded a red/orange alert for extremely heavy rainfall across Darjeeling, Kalimpong, Jalpaiguri, Alipurduar and Cooch Behar through the weekend into July 20. The alert is set to scale down to yellow on July 21-22 as intensity decreases.

Districts Under Watch

Seven areas have been flagged as directly affected: East Sikkim, North Sikkim, West Sikkim, Darjeeling, Jalpaiguri, Cooch Behar and Uttar Dinajpur. IMD data shows rainfall of 12-20 cm (extremely heavy) is possible at isolated spots in Jalpaiguri, Alipurduar, Kalimpong, Cooch Behar and Darjeeling on July 19-20. Ground reports confirm rivers like the Torsa are already in spate, with flash floods reported in parts of the Dooars and silt-laden rivers overflowing into low-lying areas.

Possible Impacts Highlighted

The bulletin lists four key risks for the region, useful for framing the “what to expect” section of your report:

• Rapid rise in streams and small rivers, especially the Teesta, Torsa, Jaldhaka and Raidak

• Localised flooding in vulnerable low-lying areas of the plains

• Landslides over steep hill slopes in Darjeeling and Kalimpong[telegraphindia +1]

• Difficult travel conditions during intense rainfall, with reduced visibility

On the ground, NH-10 has already been shut near Bardang (20th Mile) for three days of restoration work by NHIDCL, and sporadic minor landslides have hit several hill locations, though no major landslide or fatality has been reported so far.

Why This Isn’t a Flood Warning

A crucial editorial point from the infographic: Flash Flood Guidance is explicitly not a flood warning. It’s a predictive model combining recent rainfall, current soil moisture, watershed conditions, and forecast rainfall to flag where flash flooding becomes more likely — it identifies elevated risk, not confirmed events. This distinction is worth emphasizing to readers so they understand it as a precautionary tool rather than an active flood alert.

Suggested Report Structure

For your Khabar Darjeeling piece, consider this flow: lead with the IMD alert and dates, follow with affected districts, list ground impacts already occurring (NH-10 closure, river levels), explain the flash flood guidance concept for reader clarity, and close with safety advisories.

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