The monster cloud has moved away but rain won’t until Wednesday afternoon, the weather office said after another day of scattered showers left parts of the city in a sea of waterlogging woes.
Calcutta received 50mm of rain in 24 hours since a 12km tall column of cloud enveloped the city in darkness at day on Monday afternoon. Fearsome thunder and lightning had accompanied the torrent, caused by a cyclonic circulation over the Bay of Bengal.
While the circulation shifted and weakened overnight, the city kept getting rain because incursion of moisture continued. Most of the rain that came till 8.30pm on Tuesday was in three spells in the morning between 6.50am and 10am.
The rain is likely to subside by Wednesday afternoon with the possibility of a strong comeback on Thursday.
“The cyclonic circulation that was behind Monday’s thunderstorm intensified into a low-pressure area during the night and moved close to the Bengal-Odisha coast,” said Gokul Chandra Debnath, director of the India Meteorological Department in Calcutta.
The low-pressure area has since weakened and started moving towards the coast but the monsoon trough, currently in Odisha, is being pulled towards central Bengal. If this movement continues, the rain will return on Thursday.
The rain on Tuesday morning was almost uniformly distributed, Mominpur recording the highest of 61.7mm. Dhapa had 60mm, Thanthania 58.8mm, Ultadanga 55mm, Chetla 48.2mm and Jodhpur Park 47mm.
Sucheta Nagar and Shahidnagar in Jadavpur, Golf Garden, Picnic Garden, Jodhpur Park, and several pockets of Behala and Kasba suffered flooding.
The Tollygunge-Panchannagram channel, where rainwater from Sucheta Nagar, Shahidnagar and places around Peerless Hospital drain out, was almost spilling over by evening.
Mayor Sovan Chatterjee admitted that east Calcutta, especially the areas along the Bypass, and the added areas of the Calcutta Municipal Corporation could do with better drainage. “We have been able to drain out water in many areas of north Calcutta but we do not have any pumping station in Jadavpur, Behala, Tiljala and east Calcutta. There are some problems here,” Chatterjee said, replying to an adjournment motion moved by the Opposition in the CMC.
Even north Calcutta wasn’t spared on Tuesday. At 9am, Central Avenue resembled a swimming pool with both flanks under waist-deep water. “I had to get off a taxi, roll up my trousers and wade through the water to reach my office. There was no alternative,” said south Calcutta resident Suman Ghosh.
Even the IIM campus in Joka didn’t escape flooding. Officials of the institution called up civic engineers several times during the day, requesting them to drain out the stagnant water, sources said.