What kind of wind did God send that made Jonah grow faint?

Answer: A scorching east wind

After the plant withered, God appointed a scorching east wind, and the sun beat on Jonah's head until he grew faint.

“As the sun was rising, God appointed a scorching east wind, and the sun beat down on Jonah’s head so that he grew faint and wished to die, saying, “It is better for me to die than to live.””— Jonah 4:8 (BSB)