Pfff, check this out:

In my recent visit to Jakarta I found out that things are worse than I had envisaged. What I have feared has become reality. Lands in northern parts of Jakarta have subsided. Jakarta bypass has subsided by 50 centimeters since it was laid. The deep wells in Jakarta have to go deeper and deeper to produce water, and their output has been dropping off with time and many wells have been producing undrinkable water. Seawater has infiltrated as far as 7.5 kilometers from the coastline into the land and corrupted the groundwater such that it has become undrinkable.

Hopefully their mitigation plan works.