Tierra Caliente (Mexico)
Tierra Caliente (Spanish for Hot Land) is a cultural and geographical region in southern Mexico that comprises some low-elevation areas of the states of Michoacán, Guerrero and Estado de Mexico. As the name suggests, the region is characterized by a hot climate. The overall precipitation is also low - around 600 mm/year, but can be as low as 400 mm in some low-lying areas of Michoacán and Guerrero.
The region is characterized by low human development and civil unrest, and has become an epicenter for Mexican drug production (notably opium poppy) as well as drug trafficking.  It is mainly inhabited by indigenous communities.
- Wilkinson, Tracy (2013-06-11). "In the hot land, Mexicans just say no to drug cartels". Los Angeles Times. Los Angeles, CA. Retrieved 2015-02-10.
Acuña, R. (1987). Relaciones Geográficas del Siglo XVI: Michoacán. Universidad Nacional Autónoma de México.
Gerhard, P. (1972). A Guide to the Historical Geography of New Spain. University of Cambridge Press.