A weather disturbance in the Indian Ocean will lead to heavy rains in Chennai and coastal Tamil Nadu today.
The Chennai Municipal Corporation is monitoring all subways.
IIT Chennai has created a crowdsourced website where people can report water logging in their area. At this time, the map looks like this:
According to Indian Met Department, the rainfall so far is:
Chennai has experienced a lot of untimely rainfall this year. Usually, Tamil Nadu gets rainfall towards the end of the retreating North East monsoon. It also gets some rains from the frequent low pressure areas that form in the Indian Ocean. The current rain is because of one such low pressure formation.