Dream meaning of heat
To dream that you are oppressed by heat, denotes failure to carry out designs on account of some friend betraying you. Heat is not a very favorable dream.

For Jung, heat is an image of the libido. Any representation—or even the mere mention—of heat always bears a symbolic relation to maturation, whether biological or spiritual. In emblems of the sun, it is portrayed as wavy lines alternating with the straight lines representing light. We should also bear in mind all the correspondences which exist between heat and tones, sounds, colours, the seasons, etc.
Dreaming of a stifling heat suggests that you have a lot of energy but you are not using it properly. This dream may indicate a tendency toward aggression and conflict. You despise yourself and tend to externalize your own dissatisfactions against others.
If you burn and have a burning sensation in the dream, it is a sign of lawlessness in your instincts.
A dream of heat on your face has the same meaning as blushing, but a dream of suffering from heat is a warning to keep a strong control on your passion and/or temper if you want to avoid getting into an awkward situation.
If your dream is getting hot—in any sense of the word—you are warming up to a situation. You might just be getting passionate about it—or him … or her.