It was still well short of midday; the heat would grow worse yet.

We headed back to the ship when the heat grew intense.

It made sense that he would go there at this hour, before the heat grew unbearable.

The heat was bearing down on them, and growing hotter.

He got two more armfuls before the heat grew too much.

"Once the heat grows they go to the water hole."

April gave way to May and every day the heat grew worse.

But the further they went, the more the heat diminished and the air grew cooler.

The heat grew when his game show got off to a mediocre start.

The heat from above grew stronger, and the light became much brighter.