Jonah 4:8

‘And it came about, when the sun arose, that God prepared a sultry east wind, and the sun beat Jonah's head so that he fainted, and requested for himself that he might die, and said, “It is better for me to die than to live.”

Furthermore when the sun arose He prepared a sultry east wind which increased the heat levels so that the burning sun beat down on Jonah's head even more devastatingly, making him faint. Indeed he found it so uncomfortable that he prayed that he might die, saying that, without the protection that had been provided by God's mercy it was better for him to die than to live. Whether he meant it seriously we do not know, but in the mood that Jonah was in anything was possible. Perhaps he had Elijah's request to God in mind, but if so he had far less excuse than Elijah who was being pursued by determined enemies and felt that all had failed. Jonah's problem was that he had succeeded too well for his own good.