Until 1981, Yoem Pueblo, a Yaqui Indian village of about 85 people here, was without paved streets, electricity, sewers or indoor toilets.

Today the village, founded in 1936 by descendants of Indians who fled the Mexican revolution, is buried in mud, the earthen walls of its adobe houses eaten away by floodwaters. Pets, chickens and livestock roam its recently paved streets, the pavement cracked and buckled.

''Mother Nature has helped them take a step backward,'' said John Arnold, director of a state agency that assists farm workers and rural communities.

It was just one example of the devastation that several days of rain has caused in Arizona, claiming at least 13 lives, leaving thousands of people homeless and causing more than $100 million in damage statewide, according to a state estimate. While skies cleared over much of the state today, flood warnings were still in effect in some areas and the National Weather Service warned that more rain might fall later in the week. Copper Town Is Hit