Kolkata Durga Puja Pandals Hit Hard as 300mm Rain Causes Severe Waterlogging and Business Losses Photo : PTIKolkata Rain : Kolkata is dealing with very heavy rainfall, leaving Durga Puja pandals inundated and business owners counting their losses. In just five hours, the city recorded an extraordinary 300mm of rainfall, causing waterlogging across key areas and disrupting festivities. I have read about Uttarakhand and Himachal witnessing such rainfall but this is the first time that Kolkata faced this. In five hours, 300mm of rainfall,” he said. 7 Dead Due To Heavy RainKolkata was brought to a standstill as extremely heavy rainfall triggered severe flooding across the city, disrupting daily life and transport.