heat
if you can't stand the heat, get out of the kitchen if you can't deal with the pressures and difficulties of a situation or task, you should leave others to deal with it rather than complaining. proverb
in the heat of the moment while temporarily angry, excited, or engrossed, and without stopping for thought.
pack heat: seepack.
turn the heat on someone or something concentrate pressure or criticism on someone or something. informal
turn up the heat intensify pressure or criticism. informal