What emergency occurs in Chapter 17 that sends Alex rushing to the jail to see Jamey?

In Chapter 17, Alex rushes to the jail to see Jamey. Alex is told that Jamey tried to commit suicide. When Alex arrives at the jail, he learns that Jamey continued to bang his head against the wall until he bled. Fortunately, Jamey does not have any broken bones or internal injuries. Jamey is said to have been talking about plumes and poisoned earth during the episode.