Jakarta is sinking while sea levels rise.
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Sinking land plus rising seas are putting hundreds of millions of people at risk.
A resident sits inside a styrofoam box as he wades through a flooded area in Jakarta in early January.
Mast Irham/EPA
Indonesia’s capital Jakarta will face escalating flood costs by 2050.
The Ganges delta spans India and Bangladesh and is home to more than 100m people.
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Sea levels are rising, while deltas are being starved of sediment by upstream dams.
Levees in New Orleans were unable to prevent flooding during Hurricane Katrina in 2005.
Jocelyn Augustino/FEMA
Delta cities in both rich and poor countries face uphill, and potentially costly, battle in containing risk from flooding.