"The Indonesian capital of Jakarta is home to 10 million people but it is also one of the fastest-sinking cities in the world"

BBC:

"If we look at our models, by 2050 about 95% of North Jakarta will be submerged."

...

Authorities are also hoping that the Great Garuda, a 32km outer sea wall being built across Jakarta Bay along with 17 artificial islands, will help rescue the sinking city - at a cost of about $40bn.

It's being supported by the Dutch and South Korean governments and creates an artificial lagoon in which water levels can be lowered to allow the city's rivers to drain. It will help with the flooding which is an issue when the rains come.

Related:

It's never been a question of whether the Ala Wai Canal will overflow, but when. Here's what the @CorpsHonolulu thinks the 100-year flood could look like when it hits Honolulu. pic.twitter.com/76AnpGszIG

— Anita Hofschneider (@ahofschneider) August 24, 2018