The province of South Africa in which I live, the Western Cape, is in severe drought. Many shuls across the country are praying for rain, and a few days ago the Chief Rabbi of South Africa declared a public half-day fast.
Both the Tochachah at the the end of Seifer Vayikra and the 2nd paragraph of Shema talk about lack of rain as a general punishment for sinning in general.
I want to know if there are any specific sins which Hashem punishes with drought. If there are, then it should be those specifc sins which we should be focusing on doing teshuva for.