And I called for a drought upon the land - God called to the people and they would not hear. It is His ever-repeated complaint to them. “I called unto you, and ye would not hear.” He called to His inanimate creatures to punish them, and “they” obeyed. So Elisha tells the woman, whose son he had restored to life, 2 Kings 8:1. “The Lord hath called to the famine, and it shall also come to the land seven years.”
And upon men, - in that the drought was oppressive to man. The prophet may also allude to the other meaning of the word, “waste,” “desolation.” They had left the house of the Lord “waste,” therefore God called for waste, desolation, upon them.