What to Do in an Emergency at High Altitudes

Everyone · How-to · Updated October 1, 2026 · LearnLife Editorial

What do you need before starting emergency action at high altitude?

Before addressing any emergency at 18,000 feet, having the right equipment and knowledge is crucial. Essential gear includes supplemental oxygen with a regulator, a communication device such as a satellite phone or GPS-enabled radio, layered warm clothing to combat cold temperatures, a first aid kit equipped with altitude sickness medications, and hydration supplies. Also, carry a map or GPS device to track your location and plan descent routes. Preparing mentally by understanding altitude sickness symptoms and emergency protocols enhances your ability to act quickly and correctly. For example, climbers often carry acetazolamide, a medication that helps prevent and treat altitude sickness; if you use this, know the dosing and side effects beforehand. If you’re part of a group, ensure everyone knows the emergency plan and how to signal for help. Without these preparations, managing an emergency at high altitude becomes dangerous and less effective.

What are the first steps to take in an emergency at 18,000 feet?

When you or someone else shows signs of altitude sickness or another emergency, follow these steps:

1. Recognize symptoms immediately: Look for headache, nausea, dizziness, shortness of breath, confusion, or fatigue. For example, if someone complains, “I feel dizzy and can’t catch my breath,” act without delay.
2. Stop all physical activity: Tell yourself or others, “Stop moving now. Sit or lie down.” Exertion increases oxygen demand and worsens symptoms.
3. Administer supplemental oxygen: Connect the oxygen mask securely and set the flow to the prescribed level, often 2-4 liters per minute. If you don’t have oxygen, prepare for descent quickly.
4. Begin descent as safely and quickly as possible: Even descending 500 to 1,000 feet can improve symptoms. If the terrain is steep or dangerous, move slowly and steadily, avoiding slips or falls.
5. Communicate your condition and location: Use your radio or satellite phone to report your status to rescue teams or your group. Say exactly where you are and what symptoms are present.
6. Keep warm and hydrated: Drink water regularly, even if you don’t feel thirsty, and use insulated jackets or blankets. Cold worsens altitude sickness and dehydration.
7. Monitor symptoms continuously: Check mental status and breathing every 10-15 minutes. If symptoms worsen, prepare for emergency evacuation.

These steps prioritize stopping symptom progression and improving oxygen intake, which are lifesaving at extreme altitudes.

How do you know the emergency response at high altitude is working?

You will know your response is effective when symptoms start to ease. Specifically:

• Headache and dizziness should lessen within 30 to 60 minutes.
• Breathing should become less labored; you should feel able to take deeper breaths.
• Mental clarity improves; you can think, speak, and respond normally.
• Nausea and vomiting reduce or stop.
• Physical strength returns enough to walk or move slowly if needed.
• Feeling warmer and less fatigued indicates improved circulation.

For example, if you were unable to walk due to dizziness but can now stand steadily and take slow steps, this is a good sign. Improvement in oxygen saturation readings, if you have a pulse oximeter, also shows progress. However, improvements might be slow, so continue monitoring and rest. If symptoms disappear completely, your emergency response has succeeded.

What should you do if the emergency response at 18,000 feet isn’t working?

If symptoms worsen despite your efforts—such as increasing confusion, inability to walk, vomiting, or loss of consciousness—immediate action is needed:

• Prioritize rapid descent: Use every available method to move to lower altitude safely. For example, if someone cannot walk, carry or assist them carefully downhill.
• Use emergency signaling: Deploy flares, whistle, or mirrors to attract attention from rescue teams.
• Conserve oxygen: If supplies are limited, use them only for the most critical moments but keep the mask on as much as possible.
• Administer prescribed medications: If you have acetazolamide or dexamethasone, give them as directed, but only if you are trained to do so.
• Keep the patient warm and positioned safely: Lay them flat if unconscious, and protect from wind and cold.
• Call for emergency evacuation: Use your communication device to contact rescue. Provide clear details: “We have a person with severe altitude sickness at 18,000 feet, unable to walk.”
• If alone, stay put if moving is impossible: Conserve energy, signal frequently, and wait for rescue.

Acting quickly and decisively can prevent fatal complications like high-altitude cerebral edema (HACE) or pulmonary edema (HAPE).

How can you adapt emergency steps for different situations or people at high altitude?

Adaptations depend on who is affected, available resources, and environmental conditions. For example:

• Children and older adults: They may decline faster; prioritize oxygen and descent more urgently. Use calm, reassuring language: “We’re going to help you; just rest.”
• Remote or technical terrain: Communication may be limited. Use visual signals like brightly colored clothing or reflective mirrors. Choose the safest descent route even if longer.
• Group emergencies: Assign roles—one person monitors vitals, others manage equipment or guide descent. Keep group members together to avoid separation.
• Underlying health conditions: If someone has asthma or heart issues, ensure medications are accessible and monitor breathing closely.
• Limited oxygen supply: Use it on the most severely affected first, rotate if necessary, and focus on descent.
• Weather extremes: In storms or extreme cold, shelter briefly if descent is unsafe, but prepare to move as soon as possible.

Tailoring your response improves survival chances and reduces panic.

What extra precautions can help prevent emergencies at 18,000 feet?

Prevention is the best strategy to avoid emergencies:

• Acclimatize gradually: Spend days at intermediate altitudes before ascending higher.
• Stay hydrated: Drink at least 3-4 liters of water daily, avoiding alcohol and caffeine.
• Eat high-energy, balanced meals: Include carbohydrates for energy and protein for muscle recovery.
• Avoid overexertion: Pace yourself, take frequent breaks, and listen to your body.
• Carry and use supplemental oxygen: Know how to set it up and check your equipment before ascent.
• Train in first aid and altitude sickness recognition: Practice breathing and relaxation techniques.
• Plan evacuation routes: Have clear, easy-to-follow descent paths and backup plans.
• Use weather forecasts: Avoid climbing or traveling in storm conditions.
• Travel with experienced companions: Never go alone, and check each other’s condition regularly.

These steps reduce the risk of altitude sickness and increase your ability to respond swiftly.

How do you prepare mentally and physically for potential emergencies at high altitude?

Mental and physical preparation can save lives:

• Train physically: Engage in aerobic exercises like running, swimming, or cycling for several weeks before your trip to build cardiovascular strength.
• Learn about altitude sickness: Know symptoms and emergency steps so you can recognize and act early.
• Practice stress management: Techniques like deep breathing, meditation, or visualization prepare you to stay calm under pressure.
• Prepare checklists: Write down emergency procedures, gear lists, and contact information.
• Simulate emergencies: Practice using oxygen equipment and communication devices.
• Rest well: Ensure you are healthy and well rested before ascent.
• Stay positive but realistic: Confidence helps maintain clarity during emergencies, but don’t underestimate risks.
• Discuss plans with your group: Clear communication reduces panic and confusion during emergencies.

A prepared mind and body improve decision-making and endurance when facing emergencies.

When should you seek professional medical help after an emergency at 18,000 feet?

Always seek professional medical evaluation after any altitude emergency, especially if:

• Symptoms persist longer than 24-48 hours.
• You experienced severe symptoms like loss of consciousness, severe headache, or difficulty breathing.
• You needed supplemental oxygen or emergency descent.
• You develop new symptoms such as coughing up pink sputum, swelling, or chest pain.
• You have underlying health conditions that may have been affected.

Visit a healthcare provider experienced in altitude-related illnesses. Early medical evaluation can prevent complications and ensure full recovery. If symptoms recur on return to lower altitude, seek immediate help.

Frequently asked questions

How quickly should I descend if I suspect altitude sickness?

Descend as soon as mild symptoms appear, ideally 500 to 1,000 feet or more. If symptoms worsen, descend immediately without delay to prevent serious complications.

What should I say when calling for help at high altitude?

Clearly state your location, number of people affected, symptoms observed, and any medical aid administered. For example: “This is a group at 18,000 feet on the north ridge, two people with severe altitude sickness, one unconscious.”

Can hydration alone prevent altitude sickness?

Hydration helps but doesn’t prevent altitude sickness by itself. Gradual acclimatization, rest, and oxygen use are also necessary preventive measures.

What if I run out of oxygen during a high altitude emergency?

Prioritize rapid but safe descent and use emergency signaling to attract rescue. Conserve remaining oxygen for critical moments.

How can I help someone who is confused or disoriented at 18,000 feet?

Speak calmly and clearly, keep them warm, prevent them from wandering, and assist with descent. Monitor their breathing and mental status closely.