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Hypothermia

Hypothermia occurs when your core body temperature falls below normal. Hypothermia due to environmental exposure can occur during any season and in most climates. It can easily happen in cold winds or wetness. Hypothermia can also occur in moderately cool temperatures, particularly if coupled with dehydration. People tend to forget to drink on cool, wet days, and can get hypothermic even when the temperature stays well above freezing.

Symptoms of hypothermia include:

  • Slurred speech. 
  • Weakness and loss of coordination. 
  • Confusion. 
  • Irrational behavior.
  • Uncontrollable shivering (although, at extremely low body temperatures, shivering may stop). 
  • Pale and cold skin. 
  • Drowsiness – especially in more severe stages. 
  • Slowed breathing or heart rate.

Your body automatically begins to shiver to warm itself. As your energy is used up to keep warm, you may reach a point where your body will be unable to warm itself. If left untreated, your body will gradually shut down; and you can die.

You can avoid hypothermia with the following precautions:

  • Stay hydrated.
  • Avoid fatigue.
  • Avoid cold winds.
  • Change out of wet clothes.
  • Be aware of the symptoms and act immediately upon their onset.

If you recognize hypothermia, take the following steps:

  • Move the patient to shelter.
  • Remove wet clothes and replace them with warm, dry garments.
  • If the victim is alert, give them food and warm liquids to drink.
  • Insulation protects from heat loss. Insulating materials include extra clothing, blankets, quilts, sleeping bags, and insulated pads.
  • A sleeping bag should not be used like a blanket; rather the patient should be placed inside, and the enclosure should be completely zipped up. Multiple sleeping bags, if available, can be placed within each other to create a multilayered enclosure.
Image
Info graphic of a chart that explains how to assess a potentially hypothermic patient.

 

Category
Firefighter Health & First Aid
References
Survival in the Ice - Part 1
NWCG Incident Response Pocket Guide, PMS 461
Interagency Standards for Fire & Fire Aviation Operations (Red Book)

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NWCG Latest Announcements

NEW! Incident Performance and Training Modernization Story Map Now Available

Date: Aug 26, 2025
Questions? Please contact:
National Wildfire Coordinating Group

NWCG is excited to announce the launch of the Incident Performance and Training Modernization (IPTM) Story Map, a new interactive resource that showcases how NWCG is transforming wildland fire training and qualifications through a performance-based system.

Since its launch in 2023, IPTM has made major strides in updating how we manage incident positions:

  • 36 incident positions now have new Incident Position Standards and Next Generation Position Task Books available for field use
  • 6 more incident positions are nearing completion
  • 111 total incident positions are being analyzed through the IPTM initiative

The Story Map guides you through the IPTM process, highlights key accomplishments, and outlines what’s ahead. Whether you are a trainer or a trainee, this tool offers valuable insight into the modernization effort shaping the future of wildland fire training and qualifications.

This effort would not be possible without the contributions of NWCG staff, NWCG committees, and hundreds of subject matter experts across the wildland fire community.

References:

IPTM Story Map

Incident Performance and Training Modernization Webpage

NEW! S-290, Intermediate Wildland Fire Behavior (Blended) Available Now

Date: Aug 15, 2025
Questions? Please contact:
Fire Behavior Subcommittee

NWCG is excited to announce that the S-290, Intermediate Wildland Fire Behavior (Blended) training is now available on the Wildland Fire Learning Portal. S-290 (Blended) training combines online training and instructor-led training components that support individuals working towards any Single Resource Boss or Fire Effects Monitor incident qualifications.

This second course in the series collectively serves to develop fire behavior prediction knowledge and skills, and provides more detailed information on fuels, weather, and topography that affect wildland fire behavior for safety purposes.

Students are required to finish the prerequisite S-190, Introduction to Wildland Fire Behavior, before enrolling in S-290, Intermediate Wildland Fire Behavior (Blended).

References:

S-290, Intermediate Wildland Fire Behavior (Blended)

S-190, Introduction to Wildland Fire Behavior

Wildland Fire Learning Portal

NEW! S-271, Helicopter Crewmember (Blended) Now Available

Date: Aug 14, 2025
Questions? Please contact:
Interagency Helicopter Operations Subcommittee

The S-271, Helicopter Crewmember (Blended) is now available. Developed through the Incident Performance and Training Modernization (IPTM) effort, this training supports individuals working towards Helicopter Crewmember (HECM) incident qualifications. 

S-271, Helicopter Crewmember (Blended) training combines online training and instructor-led training components. This course is designed to provide students with the knowledge and skills necessary to perform the duties of the HECM position, as described in the NWCG Incident Position Standards for Helicopter Crewmember, PMS 350-22.

Any changes to qualification pathways will take effect with the next update of the NWCG Standards for Wildland Fire Position Qualifications, PMS 310-1, scheduled for January 2026.

References:

S-271, Helicopter Crewmember (Blended)

NWCG Helicopter Crewmember (HECM) Position Page

Wildland Fire Learning Portal

Incident Position Standards and Next Generation Position Task Books Now Available for FBAN and LTAN

Date: Aug 13, 2025
Questions? Please contact:
Fire Behavior Subcommittee

NWCG is excited to announce that Incident Position Standards and Next Generation Position Task Books are now available for Fire Behavior Analyst (FBAN) and Long Term Fire Analyst (LTAN).

The Performance Support Packages for these positions were developed as part of the Incident Performance and Training Modernization (IPTM) effort. These resources support trainees, qualified personnel, and evaluators in their respective roles.

Any changes to qualification pathways will take effect with the next update of the NWCG Standards for Wildland Fire Position Qualifications, PMS 310-1, scheduled for January 2026.

References:

NWCG Fire Behavior Analyst Position Page

NWCG Long Term Fire Analyst Page