#What does Yahweh say he will do if the people do not obey his commandments and decrees?

Yahweh says if the people do not obey his commandments, they will be punished seven times as severely for their sins. [26:18]

#What did Yahweh say he would do to the weather if Israel did not obey his commandments?

Yahweh said he would make the sky over them like iron (drought). [26:18-19]