A new study published in the Journal of Geophysical Research found that New Orleans is sinking, with one neighborhood losing as much as an inch per year, NBC News reported.
The most threatened area of the city is Michoud, a neighborhood between Lake Ponchartrain and Lake Borguen. The Upper 9th Ward is losing just under half an inch to nearly one inch per year.
Groundwater withdrawal was one of the causes, the study found.
Conducted between 2009 and 2012, the study was published last week and used GPS and radar.