Heavy rains battered Chennai and adjoining Kanchipuram, Cuddalore and Thiruvallur districts between October-December 2015, leading to the death of 421 people.
DMK activists held a protest demonstration in Chennai on Tuesday and demanded a judicial inquiry into the release of surplus water from Chembarambakkam lake in Chennai and subsequent flooding in the city.
DMK president M Karunanidhi led the protestors.
Heavy rains - the worst in a century - battered Chennai and adjoining Kanchipuram, Cuddalore and Thiruvallur districts between October-December 2015, leading to the death of 421 people.
Chief Secretary K Gnanadesikan said on December 13 that the Chennai flooding was not due to official indecision or mismanagement of water release from Chembarambakkam lake into the Adyar river.
He said it was caused primarily by very high rainfall in November, followed by more rain in Chennai, Kanchipuram and Tiruvallur districts on December 1.