'Heat' in the Bible

"While the earth continues to exist, planting time and harvest, cold and heat, summer and winter, and day and night will not cease."

Then he set up the peeled branches in all the watering troughs where the flocks came to drink. He set up the branches in front of the flocks when they were in heat and came to drink.

When the stronger females were in heat, Jacob would set up the branches in the troughs in front of the flock, so they would mate near the branches.

I was consumed by scorching heat during the day and by piercing cold at night, and I went without sleep.