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Ann: The normal human body's temperature is about 37 C. But, because Shego is so... unique, I'm not sure what's normal for her. It must take a lot of energy to generate those... flames. I won't be surprised if she does have a higher metabolism than normal so what I'm seeing could be normal, or...
Kim: How much is it?
Ann: 42.
Drakken: Is that bad?
Ann: It could be.
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Let's face it, some characters are pretty damn hot. Other characters may have raging hot passion. But in this trope's case, we find fictional creatures that are literally Hot-Blooded (or anything that's close enough to blood).

This type of being usually has an implication (or at least a possibility) of a temperature difference that's caused by metabolism-based weirdness. This makes some sense, as there are several organisms in Real Life that have an average body temperature that's higher than the human average.

Characters that can play with fire tend to exhibit this trope, along with many fire-related monsters like dragons, salamanders, and fire-related familiars. Lava beasts, fire elementals, and other creatures that actually made of some heat related substance are another trope altogether.

They may be Wreathed in Flames, have Volcanic Veins or have Flaming Hair as well. Contrast Chill of Undeath.

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Examples

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    Anime & Manga 
  • Shishio, the season 1 big bad of Rurouni Kenshin. He was shot in the head and lit on fire before being left for dead. The fire left him disfigured, and all of his sweat glands were destroyed. As such, he has incredibly high body temperature, which (apparently) grants him almost superhuman speed and strength. The downside is that he can only fight for about fifteen minutes before the heat buildup kills him.
  • JoJo's Bizarre Adventure:
  • In Kill la Kill, Ryuko is normally simply Hot-Blooded, but when she finally confronts her father's murderer her rage reaches a boiling point. That is to say, her blood is literally seen to boil, driving Senketsu into a frenzy.
  • The Titans of Attack on Titan have extremely high body temperatures, which appears to increase along with their size. The Colossal Titan radiates superheated steam thanks to its lack of skin, and another Titan, twice the size of the Colossal, is so hot that it causes nearby vegetation to combust.

    Comic Books 
  • In PS238, Suzi has an internal body temperature which can melt lead, which appears to stem from her radioactive nature. Incidents where she loses her temper are explained as "gas leaks".
  • Supergirl's blood was burning-hot during her Red Lantern tenure in Red Daughter of Krypton. This is true of Red Lanterns in general, as the Red Rings' energy replaces their blood. As such, the removal of a Red Ring from their host would, under the majority of circumstances, result in their death.
    • However, it may also be true of Kryptonians in general, at least under a yellow sun. During a story where Superman was deathly ill due to being attacked by a Kryptonite-bearing nanobot and a number of heroes needed to enter his body to save him, the ones who were vulnerable to such things were warned that his blood was hot enough to turn a human into grease in his bloodstream if their suits ruptured. This is probably due to Kryptonian blood being charged with solar energy, as shown when Superman gets bitten by Dracula in another story — the solar-charged blood plus the vampire's weakness to sunlight makes for an explosive result.
  • Runaways has a variation; while it is unknown if Karolina's Majesdanian blood is especially hot, it is supercharged with solar energy, a fact that the vampire Topher learns the hard way when he tries to feed on her.
  • Wonder Woman (1987): Medusa's blood steams, and the pool of blood from her decapitation gets hotter rather than cooler until Pegasus is reborn from it.

    Fan Works 

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    Film — Animated 

    Film — Live-Action 

    Literature 
  • Werewolves in Twilight. (Perhaps that's why they so rarely wear shirts.)
  • The Marat in Codex Alera are slightly warmer than humans. This is important in the first book, when one is trying to sneak into a forest guarded by creatures who see in infrared.
  • Sauron himself in The Lord of the Rings. The reason why his ring was glowing on his hand was because he was inhumanly hot.
  • In The Sookie Stackhouse Mysteries, werewolves and other shifters are mentioned several times time as "running hotter" than their human counterparts.
  • The "vampires" of I Am Legend are humans with a disease that (among other things) sends the body into overdrive. They run a fever of about 103 Fahrenheit as a baseline.
  • A Song of Ice and Fire:
    • Dragons do this. In fact, wound them and leave the weapon behind, and it may start to glow with the heat depending on how high quality the iron or steel is. Bronze and copper are likely to fare worse and could well start to turn molten if left too long (and goodness knows if they can give the poor dragon blood poisoning or not). Good luck trying to play vet, though.
    • Befitting a priestess of R'hllor, Melisandre is not affected by cold, and her body gives off noticeable heat.
  • Simes in Sime Gen have a body temperature noticeably higher than that of Gens and children. This incidentally means they don't get sick as often as many germs can't tolerate the higher temperature.
  • In a novel based on Magic: The Gathering, a Black-aligned vampire is set to fight a Red-aligned Geomancer in arena-style combat. The vampire manages to evade the torrents of stone and dirt, sink his fangs into the mage's neck and begins draining him dry... at which point the Geomancer turns his own blood into lava. Cue burning vampire.
  • Anyone in Eden Green whose needle symbiote takes over their body completely begins to exhibit elevated body temperature, immediately noticeable to non-infected people.
  • In the Inheritance Cycle, dragon blood is described as being roughly the same temperature and consistency as boiling tar.

    Live-Action TV 
  • True Blood has its werewolves.
    Alcide: We run hot.
  • In Farscape, Scarrans are extremely hot, and can project this heat as a weapon. Compare with Sebacceans, who are colder than humans and vulnerable to hot temperatures. Scorpius, being a hybrid of both races, needs cooling rods implanted in his head to survive.
  • In the Supernatural Season 4 finale, Sam Winchester was said to have reached body temperature of 150F (65C) when he was killing Lilith, courtesy of the demon blood he was using.
  • Marcos Diaz/Eclipse on The Gifted (2017). His blood glows and when enough of it was spilled in a car the car exploded. A member of the Morlocks has similar blood and another mutant's blood melted through solid objects (although that may have been acid blood instead).

    Music 
  • Foreigner's "Hot-Blooded", with the singer saying he's got "a fever of 103."
  • Inverted in "My Angel is the Centerfold" ("My blood runs cold—my memory has just been sold...")

    Tabletop Games 
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  • Dungeons & Dragons: Remorhaz — hot enough that nonmagical metal weapons melt on contact, and if it swallows you, it's game over, instant death, no save, do not pass go, do not collect £200.
  • Pathfinder has Xotani, a gigantic worm whose title is the Firebleeder. Dealing too much damage to it in one attack (read: an amount large enough to actually harm it) triggers the equivalent of a flamethrower as burning blood sprays from the wound.
  • Warhammer 40,000 has the Avatar of Khaine, which has molten iron running through its veins. It's also Wreathed in Flames.
  • Warhammer Fantasy Roleplay: One of the Mutations that can be inflicted by exposure to Chaos transforms the victim's blood into molten metal or pure fire. This can be a case of Cursed with Awesome, as the "blood" generally isn't harmful to the mutant but can damage anyone who injures them.
  • Psionics: The Next Stage in Human Evolution features a somewhat realistic example of how this would play out in real life. The pyrokinetic ability Temper, Temper, Temperature can be used to raise the body temperature of living things. Raise it enough and they'll die from boiling in their own skin.

    Video Games 

    Webcomics 
  • Roza: The heroine's blood combusts when spilled.
  • The salamander demons from Heart Core (Carval and Volaster Jarvoc) have explosive blood which they use in order to make bombs.
  • Amy Druvmenski from Light and Dark has the ability to raise her body temperature to extreme levels.

    Western Animation 


Alternative Title(s): Scorching Supernaturals, Supernatural Body Heat, Inhuman Body Temperature, Inhuman Heat

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