Parts of Tehama County, including around Red Bluff, Corning and Antelope, are sinking, officials have discovered, prompting an emergency meeting to decide next steps to intervene. In a statement announcing the June 3 meeting, county officials said they found the mid- to southwestern part of Tehama had “observable land subsidence on a scale that has never been recorded.” … In Tehama County, some of the area’s groundwater dried up during years of heavy drought, according to the announcement. The soil is now collapsing into the cavity left by the absent water, making the ground above it sink. Other factors are further stressing what’s left of the underground water supply, according to the county. These include changes in agricultural practices and less surface water available from lakes, creeks and other water bodies.