So he died according to the word of the LORD which Elijah had spoken. And Jehoram reigned in his stead in the second year of Jehoram the son of Jehoshaphat king of Judah; because he had no son.
So, it happened as the Lord said through Elijah - he died. Then Jehoram took over the throne and ruled instead, during the second year of Jehoram, son of Jehoshaphat, the king of Judah. This happened because he didn't have a son.