If today's extreme years become tomorrow's normal, how should India redesign its disaster-risk and urban-drainage frameworks? Discuss.

A new study finds that 2024 saw a record number of heavy and extreme rainfall events worldwide, and that such a year could be typical by 2050 [1]. India must therefore plan for tomorrow's climate, not yesterday's rainfall records.

Why existing frameworks fall short

• Rising intensity: the heaviest one-day rainfall gets about 7% stronger per 1 °C of warming, and the rarest events rise fastest [3]. A drain sized for a "25-year storm" from old data is under-designed on the day it opens.
• Misleading averages: the 2024 monsoon ended at 108% of the long period average (LPA), and August alone was at 115% [4]. A "normal" season total can hide fewer but more violent bursts.
• Longer risk window: the 2024 extremes ran later into summer [1], which overlaps the kharif harvest and reservoir-filling decisions.

Redesigning disaster-risk frameworks

• Forward-looking hazard zoning: under the Disaster Management Act, 2005, NDMA and the state authorities (SDMAs) should base flood and landslide maps on climate-scaled projections [3], not on past return periods.
• Dam and embankment safety: the CWC should re-check spillway design floods against climate-adjusted rainfall.
• Season-long early warning: impact-based alerts should continue beyond the usual monsoon window, since extremes now arrive late [1].
• Risk finance: parametric insurance (which pays out automatically when a set rainfall level is crossed), plus climate-indexed allocation from SDRF and NDRF, for recurring loss.

Redesigning urban-drainage frameworks

• Climate margin in design: raise the design storm intensity for new drains in line with the IPCC scaling [3].
• Implement NDMA's 2010 Urban Flooding Guidelines, which first treated urban flooding as a disaster separate from river floods [5]. This means urban flood cells, catchment-based rather than ward-based planning, and GIS mapping of drains.
• Sponge-city measures: restore lakes, wetlands and floodplains; make rainwater harvesting mandatory; require permeable surfaces.
• Encroachment control: statutory protection for natural drainage channels in city master plans.

Constraints

• Weak municipal finances and technical capacity, overlapping agencies, and the high cost of retrofitting old networks slow change.

Treating 2024 as a preview rather than an outlier calls for forward-looking design standards, season-long warnings and nature-based drainage. If India builds climate projections into its disaster-management and city plans, in line with the Sendai Framework and SDG 11 (resilient cities), its disaster resilience can keep pace with the new normal.