In a country such as Mexico, where the success or failure of the crops depends entirely upon the rainfall, Tlaloc, the Rain God, was a deity of high importance. He made his home in the mountains which surround the valley of Mexico, as these were the source of the local rainfall, and his popularity is vouched for by the fact that sculptured representations of him occur more often than those of any other of the Mexican deities.

This episode is also available as a blog post: http://martinifisher.com/2018/11/23/dance-for-tlaloc-the-rain-god-and-his-people/