'Heat' in the Bible

a wild donkey used to the wilderness, that snuffs up the wind in her desire. When she is in heat, who can turn her away? All those who seek her will not weary themselves. In her month, they will find her.

For he shall be as a tree planted by the waters, who spreads out its roots by the river, and shall not fear when heat comes, but its leaf shall be green; and shall not be careful in the year of drought, neither shall cease from yielding fruit.

Therefore thus says Yahweh concerning Jehoiakim king of Judah: He shall have none to sit on the throne of David; and his dead body shall be cast out in the day to the heat, and in the night to the frost.