1.   In summer Venice is crammed with tourists and the heat is often stifling, but autumn is perfect for a short break.

2.   More heat is lost through the head than any other part of the body.

3.   More heat is lost through the head than through any other part of the body.

4.   She had Oliver draw the curtains, but then the heat was so great that they suffered at a slow boil.

5.   Some trapped heat is necessary to sustain life, but excessive accumulation can lead to warming.

6.   The excessive heat was responsible for their deaths.

7.   The heat is on as schools struggle to finish their entries by the deadline.

8.   The heat was abysmal, and so, according to them, was their set.

9.   The heat was ferocious.

10.   The heat was insufferable.