What is a Cloudburst?- Definition:A sudden, violent rainstorm that drops a large amount of rain over a small geographical area in a very short time.
- Rainfall Amount:More than 100 mm (or sometimes 20 mm) of rain can fall in less than an hour, usually over a few square kilometers.
- Location:They are common in mountainous regions, such as the Himalayas.
India's cities, including Patna, Guwahati, and Mumbai, are highly susceptible to flooding from monsoon rains, river overflows, and poor urban drainage. Recent events, like the August 2025 Uttarkashi cloudburst, highlight the growing threat of flash floods in Himalayan regions. Unplanned urbanization and climate change-induced extreme weather intensify these devastating natural hazards, impacting millions annually.
City | State | Major Flood Causes | Flood-Prone Features |
Patna | Bihar | Ganga River overflow | Low-lying alluvial plain, annual monsoon floods |
Guwahati | Assam | Brahmaputra River overflow | Floodplain location, heavy monsoon rains |
Kolkata | West Bengal | Hooghly River, tidal flooding | Deltaic region, tidal influence, high urban population |
Mumbai | Maharashtra | Coastal flash floods, cloudbursts | Coastal city with heavy monsoon rainfall, poor drainage |
Chennai | Tamil Nadu | River overflows, urban flooding | Coastal plain at river mouths, encroached waterways |
Lucknow | Uttar Pradesh | Gomti River overflow | River floodplain, inadequate drainage |
Surat | Gujarat | Tapi River floods | Coastal and riverine flooding |
Srinagar | Jammu & Kashmir | Jhelum River flooding | Riverine and flash floods in valley terrain |
Delhi | Delhi | Yamuna River overflow | Urban flooding, embankment breaches |
Kochi | Kerala | Heavy monsoon rains | Coastal city with poor drainage network |
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