What are the 5 stages of hypothermia

So hypothermia's basically when your body loses heat way faster than it can make it. Your normal temp sits around 98.6°F (37°C). Once you dip below 95°F (35°C), you're in hypothermia territory. Docs break it into five stages, each one worse than the last. Catching it early matters—a lot.

Stage 1: Mild Hypothermia (Core Temperature: 89.6°F–95°F / 32°C–35°C)

First off, your body kicks into survival mode. You're awake, alert, but shivering like crazy—that's your body trying to warm itself up. Skin goes pale and cold, you get goosebumps, fingers and toes go numb. Ever tried buttoning a shirt when you can't feel your hands? Yeah, that. You can still move, but coordination's shot.

Stage 2: Moderate Hypothermia (Core Temperature: 82.4°F–89.6°F / 28°C–32°C)

Things get real. Shivering turns violent, uncontrollable. You start getting confused, disoriented, maybe even lethargic. Speech gets slurred—people might think you're drunk. Memory gets fuzzy. Your skin takes on this bluish-gray look, and your pupils might dilate. Then the shivering just... stops. That's when your body's run out of juice. This stage? You need help fast.

Stage 3: Severe Hypothermia (Core Temperature: 75.2°F–82.4°F / 24°C–28°C)

No more shivering. You're likely unconscious or in a daze. Breathing gets real slow and shallow, heart rate drops. Skin feels cold and waxy. Muscles go stiff—you might look dead, honestly. Pupils fixed and dilated. Heart attack risk? Through the roof. And weird thing: some people feel suddenly hot and start stripping off clothes. That's paradoxical undressing, and it's bad news.

Stage 4: Apparent Death (Core Temperature: 68°F–75.2°F / 20°C–24°C)

No pulse. No breathing. No response. You look gone. But here's the kicker—because it's so cold, your cells are moving in slow motion. Your brain might still be okay for a while. People have come back from this with proper rewarming. That's why they call it "apparent death"—you look dead, but maybe you're not.

Stage 5: Death (Core Temperature: Below 68°F / 20°C)

This is it. Cells are wrecked beyond repair. Heart stops, brain stops. Can't come back from this. But don't try to call it yourself—leave that to the pros. People in stage 4 can look just as dead as stage 5, so you don't want to make that call.

What are the first signs of hypothermia?

First signs? Uncontrollable shivering, skin cold and pale, you can't coordinate your movements. Fingers and toes go numb. You feel exhausted, maybe confused. Don't brush this off—your body's screaming that it's losing heat faster than it can make it.

How is hypothermia treated at each stage?

Treatment depends on how far gone you are. Mild? Get somewhere warm, ditch the wet clothes, sip something warm and sweet. Moderate? Bring out the heavy blankets, hot water bottles, warm IV fluids. Severe? We're talking invasive stuff—warmed oxygen, maybe even cardiopulmonary bypass. Stage 4 needs aggressive CPR and advanced rewarming. Stage 5? It's about confirming death and supporting the family.

Can you survive severe hypothermia?

Yeah, actually. People have survived with core temps as low as 56.7°F (13.7°C). If you're young and healthy and get help fast, your chances are decent. Cold slows down your brain's demand for oxygen, so it can hang on longer. But the colder you get, the higher the risk of heart failure, organ damage, brain injury.

Hypothermia Stage Comparison Table

Hypothermia Prevention Checklist

• Layer up: base layer wicks moisture, middle insulates, outer blocks wind and water.
• Hat and gloves—up to 30% of heat escapes through your head, apparently.
• Stay dry, seriously. Wet clothes just suck the heat right out of you.
• Skip alcohol and caffeine before heading out in the cold—they mess with your body's heat regulation.
• Keep moving to generate heat, but don't exhaust yourself.
• Pack emergency gear: blankets, hand warmers, high-energy snacks.
• Check the weather. Don't be that person who gets caught off guard.