How much Mumbai will sink if sea level rises 70 feet? Do u knowA NASA scientist said in 5 years it may happen.

Question

How much Mumbai will sink if sea level rises 70 feet? Do u knowA NASA scientist said in 5 years it may happen.

Answer 1

It sounds like much of the city will be flooded.  I couldn't find anything about exactly where the hilly part starts.

Much of Mumbai is just above sea level, and the average elevation ranges from 10 m (33 ft) to 15 m (49 ft). Northern Mumbai is hilly, and the highest point in the city is 450 metres (1,450 feet).

India Currents, Sharat G. Lin, Posted: Dec 26, 2005

"The city was battered by the heaviest rainfall recorded … , snapping communication and power lines, closing airports, and marooning hundreds of thousands. Civic and public transport services collapsed and 5,000 army troops had to be deployed. … Food packets had to be air-dropped from helicopters, perhaps for the first time in a metro [metropolitan area].”

“The result was devastation on a scale unknown even to this monsoon-scarred city …

Within a 24-hour period, nearly a meter (37.1 inches) of rain fell, setting a new world record. The deluge battered not only Mumbai, but a 600-mile swath of the west coast of India from Surat in the north to the headwaters of the Kaveri river in the south.

The deluge adversely affected some 100 million people in four states: Maharashtra, Gujarat, Goa, and Karnataka. The official death toll directly due to rains was over 1,000, and the count of subsequent deaths due to water-borne diseases was around 300.

Mumbai is Vulnerable to Sea Level Rise

May 11 | The Times of India

Predicted sea level increases will cause serious problems for the city of Mumbai, India. Low-lying areas, poor drainage, subsidence and important transportation and other facilities in flood-prone parts of the city are some of the special concerns for this financial capital. The city is particularly vulnerable to storm surge and other events that could produce high water levels.

Answer 2

62.8% as per hydrometrological data.