Though the heavy rains that lashed the city and the suburbs and neighbouring districts of Kancheepuram, Tiruvallur and Cuddalore for more than a day yesterday have shown a let up since this morning, a continuous drizzle under overcast skies spelled further trouble for citizens.
Teams of army, navy, coast guard and NDRF have been deployed in the worst-affected areas of Tambaram, the southern gateway to the city, Mudichur and Oorapakkam.
DG MeT Department Laxman Singh Rathore said, "Extremely heavy rainfall has been occurring for sometime and today Tamil Nadu has witnessed 35 cm of rainfall that has created havoc.
"Its intensity, however, will decrease in the next 48 hours and further by 72 hours but it is likely to continue for five-seven days," he said.
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Teams have also been pressed into service in Jafarkhanpet, Saidapet and Kotturpuram on the banks of Adyar and Vadapalani and Valasaravakkam and several areas in the western parts of the city which have been flooded with waters entering residential homes.
Madurai and beyond, the old Mahabalipuram road and the East Coastal road through which Chennai can be accessed have been cut off with waters washing away the roads in several places including Guduvancheri.
While travellers from southern districts have been stranded midway, a number of passengers were also left helpless in Chennai Central and Egmore stations. Suburban railway services in Chennai have also been suspended because of flooding of tracks.
The flooding of the city and the suburbs has been caused essentialy by the surplusing of waters from the reservoirs like Chembarambakkam, Poondi and Puzhal into Adyar and Cooum that criss-cross the city flooding several areas along the banks and displacing people from homes.
Electricity has been cut off in most parts of the city as a precautionary measure while people went without essential supplies like milk and water.
Air Force helicopters were seen distributing food packets in some of the worst-hit areas.
The Southern Railways cancelled 16 trains and diverted 12 others both on the Chennai Central and Egmore sections following breaching of tracks in several areas.
In view of the water logging, Chennai Airport authorities
The Airports Authority of India has issued a NOTAM (Notice to Airmen) to all air operators in this regard, an AAI spokesperson said in New Delhi.
The spokesperson said Chennai airport authorities had initially shut operations till this morning but due to incessant rains it has now decided to extend it till 6 AM tomorrow.
Notice to Airmen (NOTAM) is a notice containing information concerning the establishment, condition, or change in any facility, service or procedure, among others, in airspace management.
"The Prime Minister has issued a memorandum and we have deployed our Central team there to assess the situation and make a report so that every possible help can also reach there," Singh said.
Two columns of army's Garrison Infantry Battalion have been pressed into service in Tambaram and Oorapakkam after the Tamil Nadu government sought military assistance. The Navy has also been deployed to assist in the operations.
"More army personnel are coming to Chennai from Bengaluru," a Defence Public Relations official said.
The NDRF is airlifting another 15 teams to the rain-battered state. While 10 teams are being airlifted from Bhubaneshwar to Tirupati, another five teams are being lifted from Delhi, NDRF DG O P Singh said.Each team comprises 40 personnel.
The teams are also carrying 20 inflatable boats along with them for the rescue operations.
NDRF DIG and commanding officer have been stationed in Chennai to take stock of the operations, he said.
Singh said that he is also in constant touch with the Relief Commissioner of Tamil Nadu.
Defence Minister Manohar Parrikar said more forces will be deployed to tackle the situation.
However, "we are facing difficulty in bringing them (forces) there as the airport is also not operating," he said.