1. Strike while the iron is hot.
2. Don't be hot-headed.
3. He hot footed it away.
4. It's too hot to handle.
6. Be hot or cold not lukewarm.
7. Hot off the press.
8. Hot on their heels.
9. Cat on a hot tin roof.
10. Hot to trot.
11. Hot spots.
13. Hot potato.
14. Don't get into hot water.
15. Red hot chili pepper.
16. She's hot.
17. Hot dog.
18. Hot sales
19. Hot as Hades.
20. Hot chocolate.
21. Hot cross buns.
22. Hot rod.
23. There'll be a hot time in the old town tonight.
Some uses refer to temperature, other don't.