Overview
- City officials announced the updated vulnerability map and preparedness figures after Commissioner G. S. Sameeran inspected Adyar estuary works on Wednesday, highlighting targeted actions at estuaries and known bottlenecks.
- Greater Chennai Corporation says Phase 1 desilted 110,211 silt catch pits and crews have cleared 1,102 km of the 1,683 km stormwater drain network with remaining stretches still under work.
- The civic body has mobilised 1,320 motor pumps, 36 GCC boats plus 256 fisheries boats, 215 relief centres, 111 community kitchens and an online volunteer system to support draining, rescue and relief operations.
- Officials flagged 105 missing drain links and metro‑affected stretches where night‑work and a Plan B of high‑capacity pumps will fill gaps that mechanical desilting cannot address before the monsoon.
- Preparations reflect Chennai’s wider flood risk from catchment inflows and shifting estuary mouths, where normal Adyar capacity of 35,000–40,000 cusecs can spike above 70,000 cusecs during major floods and overwhelm local drains.