A sudden spike in dengue cases across 14 gram panchayats and eight urban civic bodies in West Bengal has put the state health administration on alert, with the Durga Puja festival days away. The surge, concentrated in specific pockets of rural and urban Bengal over the past month, has prompted authorities to designate these zones as dengue hotspots requiring heightened surveillance.

Where the Hotspots Are

According to a state health department official, the majority of the 14 gram panchayats flagged as dengue hotspots fall within Murshidabad district, with the remaining spread across South 24 Parganas, Nadia, Jalpaiguri, Birbhum, and Hooghly districts.

On the urban front, three municipal corporations have reported a similar rise in certain wards: the Kolkata Municipal Corporation (KMC), the Bidhannagar Municipal Corporation (BMC) in North 24 Parganas, and the Howrah Municipal Corporation (HMC) in Howrah district. Specifically, six wards within the KMC, three in the HMC, and four in the BMC have been identified as zones of sudden case escalation.

Five municipalities have also been flagged as sensitive zones: Chakdaha in Nadia district and Dumdum, South Dumdum, Kamarhati, and Baranagar in North 24 Parganas.

The Numbers Behind the Concern

State health department data show that the overall dengue tally for 2026 remains marginally lower than the previous year — 10,177 cases recorded up to 7 October 2026, compared with 12,652 cases during the same period in 2025. However, officials caution that the trajectory within the past five weeks is what warrants concern.

3,948 new cases were reported in September 2026 alone, followed by nearly 1,100 cases in the first week of October — a pace that suggests acceleration rather than seasonal decline. The nine districts recording the highest case loads this year are Murshidabad, Kolkata, North 24 Parganas, South 24 Parganas, Nadia, Hooghly, Howrah, Malda, and East Burdwan.

Why Durga Puja Raises the Stakes

The timing of the surge is particularly sensitive. Durga Puja draws millions of visitors across West Bengal's cities and districts, generating large public gatherings, temporary installations, and the movement of populations between rural and urban zones — all conditions that can amplify vector-borne disease transmission. Waterlogging from post-monsoon rains and stagnant water in and around pandals are established breeding grounds for Aedes aegypti, the mosquito that transmits dengue.

This is not the first time Bengal has faced a dengue scare during the festive season. In recent years, post-Puja dengue spikes have followed the festival period in both Kolkata and surrounding districts, prompting retrospective control drives. Authorities are reportedly seeking to front-load those efforts this time.

Official Response and What Comes Next

'Despite the lower overall number of cases this year, the worrying aspect is the recent rise in infections. While 3,948 new dengue cases were reported in September, nearly 1,100 cases were recorded in the first week of October alone,' the health department official said.

State officials have identified the hotspot zones to enable targeted vector control and awareness campaigns in the days leading up to and during the festival. The health department is expected to intensify fogging operations, larval source reduction drives, and fever surveillance at the community level in the flagged wards and panchayats. How effectively these measures can be deployed in the compressed window before the festival begins will determine whether the current spike stabilises or deepens.