1.   Between takes he waited outside the main hall with a helper to wipe his glasses for him in the close summer heat.

2.   Children could find relief from the summer heat in her shop.

3.   Crowds of shoppers are sweltering in the summer heat.

4.   Crowds of shoppers sweltered in the summer heat.

5.   He went indoors to escape the summer heat.

6.   It brings some relief from the merciless summer heat.

7.   The air in here is stale and heavy, used up and burned out by the summer heat.

8.   The summer heat is coming on.

9.   They went to the hills to escape the summer heat.