Disasters in Indian geography

Story hook

On 26 December 2004 at 6:58 AM IST, a magnitude 9.1-9.3 megathrust earthquake ripped through the Sunda subduction zone off Sumatra. Three hours later, a 15-metre tsunami struck Indira Point on Great Nicobar Island, then rolled north and west. Cuddalore (Tamil Nadu) lost 600 lives in 20 minutes; Nagappattinam 6,000. Velankanni lost two-thirds of its fishing community. The total toll in India: ~16,389 dead, 5,500 missing, ~6.45 lakh displaced — the deadliest natural disaster in independent India's history. Six months later, NDMA — India's National Disaster Management Authority — was constituted under the Disaster Management Act 2005.

But disasters in India predate 2004 and continue after. Bhopal Gas Tragedy (December 1984) killed ~15,000 over the following weeks and is the world's worst industrial disaster. Latur earthquake 1993 (Maharashtra) killed ~10,000 in a region not even mapped as seismic-zone-V. Cyclone Phailin 2013 (Odisha) was the strongest cyclone in 14 years but killed only ~45 — a stunning testament to early warning. Uttarakhand 2013 floods killed 5,000+ at Kedarnath. Wayanad 2024 landslides killed 230+ in Kerala. Cyclone Michaung 2023 inundated Chennai.

India sits at the intersection of multiple disaster risks: the Himalayan seismic belt in the north, the Bay of Bengal cyclone alley in the east, the monsoon flood regime across its plains, and the drought-prone arid zones in the west and central plateau. 58% of India is earthquake-prone, 40 million hectares are flood-prone, 5,700 km of coastline are cyclone- prone, and 68% of cultivable land is drought-prone. UPSC tests this geography of risk every year — in Prelims (zone maps, NDMA acts), Mains (disaster mitigation, climate adaptation), and Interview (case studies of specific disasters).

Why this matters for UPSC

GS-III (disaster management) is the canonical home; GS-I (geography) and GS-II (governance via NDMA-SDMA-DDMA tiers) also test this. Prelims has asked about Sendai Framework, Seismic Zones, IRCS, NDRF in 2017, 2019, 2021, 2022, 2024. Mains demands integrated disaster response and climate change linkage. Interview boards probe specific 2023-24 events (Joshimath, Wayanad, Michaung).