Kolkata: Heavy torrential rain in Kolkata on Tuesday severely disrupted air travel, leading to the cancellation of at least 30 flights and significant delays in several others, officials said. The relentless downpour caused massive flooding across the city, leaving thousands of commuters stranded and severely affecting transport services. "At least 30 flights have been cancelled so far, and 31 others have been delayed," an official of Kolkata Airport said. The aviation sector is bracing for further disruptions as the India Meteorological Department (IMD) issued warnings of more heavy rainfall in the coming days, attributed to a low-pressure system forming over the northeast Bay of Bengal. The heavy rainfall, which began overnight, led to widespread waterlogging in many parts of the city.