Explore the hazard
Click a state to see its flood-exposure context and run a screening for a specific site within it. Shading is the 1% annual-chance (100-year) flood proneness.
High exposure — Major river-flood plains — Ganga / Brahmaputra / delta systems.
Moderate exposure — Localised riverine and urban flooding.
Lower exposure — Arid or elevated terrain; flash-flood pockets remain.
India — by the numbers
49.815Mha flood-prone
~1/8 of India’s land area is flood-prone
Bihar, Uttar Pradesh, Assam, West Bengal and Odisha together carry the majority of the country’s annual flooded area.
Flood-prone area: Rashtriya Barh Ayog (1980) / CWC, via Ministry of Home Affairs; national total revised to 49.815 Mha by the 12th Plan Working Group on Flood Management.
Methodology
Hazard basis: JRC Global River Flood Hazard Maps v2.1 (RP100 = 1% annual-chance), CC BY 4.0. State shading is indicative flood-proneness (basin classification), not a modeled per-state statistic.
Screening-grade orientation — not a hydraulic model or an approval basis.