India’s coastal cities face an increasing risk of flooding, driven by a warming world and the now-frequent extreme weather events. While some cities are at a higher risk, this imperils the lives, livelihoods and critical infrastructure across the cities.
Globally, the mean sea level has risen by 20 cm since 1800 and is now growing at a rate of 3.22 millimetres (mm) per year in recent years. Estimates suggest this could increase by up to 1 metre (or 100 cm) by the end of this century.
A July 2025 study by the Indian National Centre for Ocean Information Services (INCOIS), a government body, estimated that—relative to the reference period or baseline of 1995-2014—India’s coastal cities will see an increase in RMSL between 62 cm in Vishakhapatnam and 87 cm in Bhavnagar by the year 2100.
https://thewire.in/environment/sea-level-surge-how-global-warming-is-drowning-indias-megacities
16/11/2025