Houston is sinking faster than any other city in the U.S., according to a new study from the Columbia Climate School—and the problem may only be getting worse.

A new study reveals that all 28 of the most populous U.S. cities are experiencing land subsidence, with many areas sinking at different speeds. This surprising finding doesn’t just apply to coastal cities but includes many urban centers far inland.

While land sinking less than an inch per year might not seem like much on paper, small shifts in land can have big effects. Land shifts downward can impact the structural integrity of buildings, roads,