Systems

In a world of suffering, the self-interested mind craves compartmentalization, and one of the most interesting frontiers of emerging climate science traces the imprint left on our psychological well-being by the force of global warming, which can overwhelm whatever methods we devise to cope — that is, the mental health effects of a world on fire. Perhaps the most predictable vector is trauma: between a quarter and a half of all those exposed to extreme weather events will experience them as an ongoing negative shock to their mental health.

Grist has called the phenomenon “climate depression,” Scientific American “environmental grief.” And while it may seem intuitive that those contemplating the end of the world find themselves despairing, especially when their calls of alarm have gone almost entirely unheeded, it is also a harrowing forecast of what is in store for the rest of the world, as the devastation of climate change slowly reveals itself. In the sense of psychological distress, which so many of them endure, climate scientists are the canaries in our coal mine. This may be why so many of them seem concerned with the risks of crying wolf about warming: they’ve learned enough about public apathy to worry themselves into knots about just when, and precisely how, to raise the alarm.

There are the more surprising mental health costs. Climate affects both the onset and the severity of depression, The Lancet has found. Rising temperature and humidity are married, in the data, to emergency-room visits for mental health issues. When it’s hotter out, psychiatric hospitals see spikes in proper inpatient admissions, as well. Schizophrenics, especially, are admitted at much higher rates when the temperatures are higher, and, inside those hospitals, ward temperature significantly increases symptom severity in schizophrenic patients. Heat waves bring waves of other things, too: mood disorders, anxiety disorders, dementia.