All of the biggest cities in the United States are sinking into the ground in places, new satellite data reveal — and 34 million people are affected. However, some cities are sinking faster and over a much larger area than others.
A study found that Houston is the fastest-sinking city, with some areas dropping at a rate of 0.4 inches (10 millimeters) per year, while most major cities have localized zones where the land is sinking faster than 0.2 inches (5 mm).
