This map shows county to county migration patterns across the U.S. over the last year. Information is based on U.S. Census data. Clicking on Webb County, you can see that people are generally staying in Texas when moving out of the Webb. Yet, incoming movers are coming from California, Arizona, Florida, Michigan and Illinois. There needs to be at least 10 movers to generate a line on the map.
On the broader U.S. scale, the exodus from a couple of Michigan and Florida areas is pretty amazing. Have a look.