Chac is a benevolent Mayan god of rain and fertility. Some of his epithets are Ah Hoya (he who urinates), Ah Tzenul (he who gives food), and Hopop Caan (the one who lights up the sky).
His animal is the frog, who croaks when it is about to rain.
Statues of Chac show him with long curving fangs, a long curved nose, big round eyes streaming with tears, and dreadlocked hair. As one of the four Bacabs, protective gods associated with the four directions, Chac is the east, with red as his color.
Chichén Itzá, in the Yucatán, was a center of his worship, and of human sacrifice.