Cities: Twenty eight major American cities are sinking --study

Denver, Dallas among the Major U.S. Cities Sinking into the Ground Cities across the U.S., including inland ones such as Denver and Dallas, are settling into the earth, posing increased flooding risks and potentially damaging urban infrastructure Andrea Thompson Scientific American

All 28 of the most populous cities in the U.S. are sinking, worsening risks of flooding and damage to urban infrastructure, a new study finds. One of the main culprits is the extraction of groundwater to quench the thirst of growing populations and commerce.