Kolkata is expected to experience an early onset of monsoon as per the latest updates from the India Meteorological Department (IMD). In a recent bulletin, the IMD has issued a heavy rainfall alert for multiple districts across West Bengal, warning residents to remain cautious and updated. If you’re in Kolkata or nearby regions, here’s what you need to know about the expected weather changes, dates of concern, and districts on high alert.
Heavy Rainfall Expected in Kolkata: IMD Prediction Explained
The India Meteorological Department (IMD) has predicted that Kolkata, along with several other districts in West Bengal, may witness intense rainfall and thunderstorm activity due to advancing monsoon conditions. The anticipated rains are expected to begin from May 20 onwards, with peak intensity expected around May 21–22.
According to the IMD, cyclonic circulations and moisture-laden easterly winds are contributing to this sudden shift in weather. While this might bring temporary relief from the scorching heat, it also poses risks of urban flooding, especially in low-lying areas of Kolkata.

Districts in West Bengal on Rainfall Alert
The IMD’s red and orange alerts cover several districts in South Bengal, especially those vulnerable to waterlogging and flash floods. The alert list includes:
- Kolkata
- Howrah
- Hooghly
- North and South 24 Parganas
- Purba and Paschim Medinipur
- Bankura
- Purulia
- Jhargram
- Birbhum
- Nadia
- Murshidabad
Local authorities have been instructed to remain on standby with disaster management teams prepared for evacuation, waterlogging clearance, and emergency responses. The Kolkata Municipal Corporation (KMC) has also issued an advisory urging residents to avoid non-essential travel during alert periods.

What Residents Should Do: Precautions & Preparedness
Residents of Kolkata and neighboring districts are advised to:
- Check weather updates regularly on IMD’s official website or trusted news sources.
- Avoid waterlogged areas and take caution while driving during downpours.
- Ensure drainage systems around homes are unclogged.
- Stock up on essential items like water, dry food, candles, and medicines.
- Stay indoors during thunderstorms and unplug sensitive electronics to prevent damage.
Conclusion
With the IMD forecasting early and heavy monsoon activity in Kolkata and other parts of West Bengal, it’s crucial for residents to stay alert, informed, and prepared. While the rain brings relief from extreme heat, it also demands increased awareness and civic cooperation to avoid chaos during urban flooding.
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