Calcutta, the capital with the state of West Bengal, is located to the Hooghly River about 80 miles north with the Bay of Bengal. As the city is developed on near sea-stage marshland, Calcutta and its suburbs are afflicted by poor drainage and periodic flooding - Specifically over the monsoon, https://www.dailypioneer.com/2025/page1/pm-mann-ki-baat-with-shukla.html