Chennai Stormwater Drains Desilting to Finish by Oct 10 — But 25 km Still Pending

Why this matters to Tamil Nadu

Chennai's stormwater drain capacity directly determines how quickly the city recovers from heavy monsoon rain events. A blocked or silted drain that should carry 1,000 litres per second at full flow may carry only 200–300 litres when partially blocked — causing roads to flood within 30 minutes of a heavy shower, damage property, and strand vehicles. The October 10 completion target is 13 days before what is typically the first active fortnight of the Northeast Monsoon — leaving almost no margin for delays. For residents of flood-prone localities in Adyar, Tambaram, Velachery, Kolathur, and North Chennai, the desilting completion directly determines their flood risk this October and November.