Thailand's capital is sinking into the Earth at an alarming rate.

Paula Bronstein /Getty ImagesFile photo: An aerial view of a flooded field showing a monastery school on November 14, 2011 in Bangkok, Thailand. 

Thailand’s capital is both glitzy and gritty, a city of glass towers and cement hovels teeming with nearly 10 million people. 

All that steel and concrete and humanity sits on what was once marshland. The ground beneath is spongy and moist. Imagine a brick resting on top of a birthday cake. That’s Bangkok — and it’s sinking into the Earth at an alarming rate. 

Thailand’s disaster specialists have been warning of this coming calamity for years. One expert has said he’s “worried about Bangkok resembling Atlantis.” Another previously told GlobalPost that the city will be under five feet of water by 2030.

Previous estimates showed that Bangkok is sinking more than three inches per year. But newer data suggests the rate is closer to four inches per year.

Paula Bronstein /Getty ImagesFile photo: Factories are seen in an aerial view of the Rojuna Industrial district on November 14, 2011 in Ayutthaya, Thailand. 

The predictions for 2100 are even more dire. By then, Bangkok will be fully submerged and unlivable.

Like global warming, which will accelerate the city’s submersion by raising the sea level, Bangkok’s sinking woes are repeatedly shrugged off. Thailand’s military and civilian rulers alike tend to obsess over immediate concerns (namely power, prestige and money) and keep punting the problem along.

But the monsoon season, currently underway, tends to bring this crisis to mind. 

A nasty storm can suddenly turn Bangkok’s streets into gushing streams. Sewers overflow, taxis churn through fetid water and, occasionally, kids can scoop up displaced fish wriggling above the asphalt. Four years ago, during a particularly severe flood, GlobalPost found families in neck-deep waters on their second-story balconies.

Paula Bronstein/Getty ImagesAn aerial view of Honda vehicles at the flooded Honda factory in the Rojuna Industrial district on November 14, 2011 in Ayutthaya, Thailand. 

Anond Snidvongs, director of the Southeast Asia Regional Research Center, predicts the city’s outskirts will be the first to go. Parts of the shoreline beyond Bangkok are already lined with pumps that grunt noisily and purge invading seawater. They don’t always work. During heavy rains, saltwater flows in the streets.

Bangkok is swallowed up a little more each day. Experts tend to offer two solutions. 

The first is to erect a massive seawall that could cost nearly $3 billion — about half of Thailand’s current GDP.