Overnight monsoon showers inundated large swathes of Kolkata on Tuesday, leaving arterial roads and parks under water and slowing morning traffic across the city. Data from Kolkata Municipal Corporation pumping stations showed Jodhpur Park receiving about 200 mm of rain between Monday night and early Tuesday, while Salt Lake logged 88 mm and Alipore 45 mm. The India Meteorological Department said the downpour stemmed from a low-pressure area over Gangetic West Bengal and forecast heavy to very heavy rain—up to 20 cm—in Purulia, Jhargram, Paschim Medinipur and adjoining districts through 10 July. The weather office warned of further light-to-moderate thunderstorms in Kolkata, Howrah and the 24 Parganas later in the day, accompanied by gusts of 30–40 km/h. Sub-Himalayan districts such as Darjeeling, Kalimpong and Jalpaiguri are also likely to experience heavy precipitation in the same period. Across the border, Bangladesh’s Meteorological Department told river ports in Khulna, Barishal, Chattogram, Cox’s Bazar, Noakhali, Cumilla and Patuakhali to hoist signal No. 1, citing possible squalls of 45–60 km/h and thunderstorms before early afternoon.