Chaac is the name of the Maya god of rain, thunder, and lightning. With his lightning axe, Chaac strikes the clouds, causing them to produce thunder and rain. Chaac corresponds to Tlaloc among the Aztecs.
Earthenware effigy urn (an incense burner) of Chaac, 12th-14th century
Chaac sculpture at the Maya Sculpture Museum, Honduras.
Rain deity impersonator, Classic period
Tláloc is the god of rain in Aztec religion. He was also a deity of earthly fertility and water, worshipped as a giver of life and sustenance. This came to be due to many rituals, and sacrifices that were held in his name. He was feared, but not maliciously, for his power over hail, thunder, lightning, and even rain. He is also associated with caves, springs, and mountains, most specifically the sacred mountain where he was believed to reside. Cerro Tláloc is very important in understanding how rituals surrounding this deity played out. His followers were one of the oldest and most universal in ancient Mexico.
Tláloc in the Codex Borgia
Tláloc in the Codex Laud
A brazier depicting Tláloc from Ozuluama, Classic Veracruz culture.
Depiction of Patterns of War, Tláloc (bottom right)