O’Brien, L. V., Berry, H. L., Coleman, C., and Hanigan, I. C. (2014). Drought as a mental health exposure. Environmental Research, http://dx.doi.org/doi:10.1016/j.envres.2014.03.014
Variations of Hutchinson’s index to capture lagged effects, or double/triple whammy effects of cycling in and out of drought. Drought was associated with distress in rural but not urban people.