According to authorities, torrential rainfall in neighbouring Bhutan and Sikkim has further aggravated the situation in north Bengal. Major rivers, including the Teesta and Balason—an important tributary of the Mahananda River—are flowing close to danger levels, raising concerns of potential flooding in vulnerable low-lying areas.
Meanwhile, nationwide monsoon performance remains significantly below normal. Data from the India Meteorological Department indicates that India is currently facing a rainfall deficit of 41 percent between June 4 and June 18, 2026. During this period, the country received only 42.6 millimeters of rainfall against the normal average of 72.2 millimeters.
The weather department stated on Thursday, June 18, 2026, that the lack of favourable large-scale meteorological conditions has been the primary reason for the stalled advancement of the southwest monsoon into remaining parts of Maharashtra. Officials added that the current stagnation has slowed seasonal progress significantly in recent days.
Meteorologists also noted that while rainfall deficits in June, the first month of the monsoon season, are not uncommon, the situation carries added concern this year due to global forecasts warning of a likely Super El Niño event.
Authorities continue to monitor river levels and rainfall patterns closely as the situation evolves across eastern and northeastern regions.
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