Overview: Water & Lightning Emergencies
Rivers, open water, and exposed terrain concentrate two of the fastest killers in the outdoors: drowning and lightning. On a whitewater trip or a ridgeline road, the difference between a close call and a fatality is usually decided in the first few minutes — by prevention, by rescue decisions, and by knowing which patients need care first.
Critical: Drowning is fast and SILENT — it does not look like the movies. And in a multiple-victim lightning strike, the normal rules of triage reverse: treat the apparently dead first.
Why This Matters on River & Road Trips
- Moving water: Rapids, strainers, and foot entrapment turn a swim into an emergency in seconds. Rescue technique matters more than swimming strength.
- Cold water: Even strong swimmers drown in the first minutes of cold-water immersion — from cold shock and swim failure, not hypothermia.
- Exposure: Open water, ridges, and exposed roads offer no shelter from lightning. Risk management is about timing and terrain, not a magic safe spot.
- Delayed help: Post-submersion and post-strike patients can deteriorate over hours — your evacuation decisions carry the weight.
Key Points
Real drowning is silent and vertical — no waving, no yelling. Watch your group.
Rescue hierarchy: talk, reach, throw, row, GO last — never become the second patient
Never stand up in moving water deeper than your knees — foot entrapment kills
Cold-water immersion: 1-10-1 — float first and get breathing under control
Drowning CPR is ventilation-first: 2 initial rescue breaths, then 30:2 (see Lesson 03)
Lightning: spread the group out, and use REVERSE triage — treat the apparently dead first
Drowning
What Drowning Is
Definition: Drowning is respiratory impairment from submersion or immersion in liquid. It is a process, not just an outcome — a person can drown and survive, with or without lasting injury.
- The process: Water contacts the airway → reflex breath-holding → involuntary gasp → laryngospasm (the vocal cords clamp shut) and/or aspiration of water into the lungs → oxygen levels fall → loss of consciousness → cardiac arrest from lack of oxygen
- It is fast: A struggling swimmer may go under in as little as 20-60 seconds
- The core problem is oxygen: Everything in drowning care — rescue, positioning, CPR — is aimed at restoring oxygenation
Recognition: Real Drowning is SILENT
Movie drowning — waving arms, splashing, yelling for help — is fiction. The instinctive drowning response looks like this:
- No yelling: The respiratory system is built for breathing first, speech second. A drowning person cannot spare air to call out.
- No waving: Arms press down instinctively on the water's surface — they cannot reach for a rope or wave for help
- Vertical posture, head low: Body upright in the water, head tilted back, mouth at water level bobbing under and up
- No progress: Not swimming anywhere, just struggling to keep the airway above water
Critical: If someone in your group goes quiet in the water, assume trouble. Count heads constantly after any raft flip or swim — the quiet swimmer is the one in danger.
Deprecated Myths: "Dry Drowning" & "Secondary Drowning"
- "Dry drowning" and "secondary drowning" are NOT medical terms. Modern drowning medicine does not use them, and they cause more fear than understanding.
- What actually matters: Is the person symptomatic or asymptomatic after submersion?
- Symptomatic (coughing, trouble breathing, abnormal behavior) = the lungs were injured, and symptoms can worsen over the following hours → needs evaluation
- Asymptomatic (brief submersion, breathing and acting completely normally) = a person does not suddenly die days later from a normal swim. Observe closely; evacuate only if symptoms develop.
Bottom line: Forget the scary labels. Watch the patient: symptoms after submersion = evaluation. No symptoms = close observation.
Rescue Safety FIRST: The Rescue Hierarchy
More would-be rescuers drown than you'd think. A drowning person will instinctively climb whatever — or whoever — is nearest to get their head above water. Work from lowest-risk to highest-risk:
TTalk — coach them: "Swim to me! Grab the rope! Feet up!"
RReach — extend a paddle, pole, or branch from a secure position
TThrow — rope bag, spare PFD, anything that floats
RRow — approach by raft or boat, pull them over the tube
GGo — swimming contact rescue: LAST resort, trained rescuers only
Never become the second patient. An untrained swimming rescue frequently produces two victims. If you must enter the water, take flotation with you and approach from behind — a panicked swimmer will climb their rescuer.
River-Specific Hazards
Foot Entrapment
- The rule: NEVER stand up in moving water deeper than your knees
- Why: A foot wedges between rocks on the bottom, the current pushes your body over and under — even strong adults cannot fight a river pushing on their torso, and rescuers often cannot reach them in time
- Instead: If you're swimming a rapid, stay in the defensive swim position — on your back, feet UP at the surface and pointed DOWNSTREAM (feet fend off rocks), until you can swim aggressively for shore
- Aggressive swim: When you see your exit (an eddy, the shore), roll over and swim hard for it — don't drift passively past your chance to get out
Strainers
- What: Downed trees, log jams, fences — anything water flows THROUGH but a body cannot. The current pins you against it and pushes you under.
- The rule: If being swept into a strainer is unavoidable, swim aggressively AT it and go up and OVER the top — never let the current take you under it
Always: Wear a properly fitted PFD on and around moving water — for everyone, every time, no exceptions. Most river drowning victims were not wearing one.
Post-Rescue Care
Pulseless / Not Breathing
- Drowning is an asphyxial (oxygen-deprivation) arrest: open the airway and give 2 initial rescue breaths FIRST, then continue CPR at 30:2
- Hands-only CPR is NOT appropriate for drowning — the problem is lack of oxygen, so rescue breaths are essential (full CPR technique: see Lesson 03, Airway & Breathing)
- Do not waste time trying to "drain water from the lungs" — abdominal thrusts and drainage maneuvers delay ventilation and cause vomiting
Breathing Patient
- Recovery position — vomiting after submersion is common; protect the airway
- Watch breathing closely: Oxygenation is the problem in drowning. Reassess rate, effort, and sounds frequently — worsening breathing is your evacuation trigger.
- Strip wet clothes and insulate: Anyone pulled from the water is losing heat fast — dry them, insulate, and treat per hypothermia staging (see Lesson 09, Cold-Related Emergencies)
- Everyone pulled from the water gets assessed — including the swimmer who insists they're fine
Spine note: Spinal injury in drowning is rare unless there is a diving or impact mechanism (headfirst entry, thrown against rocks). Do not let spine worry delay airway and breathing care — A and B come first.
Who Evacuates After Submersion
- ANY symptoms = evacuate for evaluation. Symptoms can progress over hours as lung injury evolves:
- Coughing that persists
- Foamy or frothy sputum
- Breathlessness or increased work of breathing
- Abnormal breath sounds (wheezes, crackles, gurgling)
- Vomiting
- Altered mental status, unusual lethargy or confusion
- Brief submersion, immediately asymptomatic — breathing normally, behaving normally: observe closely for 4-8 hours; evacuate if anything develops
Cold-Water Immersion
Immersion is Not (Yet) Hypothermia
Cold-water immersion and hypothermia are different problems on different clocks. Hypothermia (core temperature below 35°C) takes tens of minutes to develop — see Lesson 09 for staging and treatment. What kills in cold water is much faster:
- Most cold-water deaths are drownings in the first minutes — caused by cold shock and swim failure, long before the core cools
- The immediate battle is keeping the airway above water, not staying warm
The 1-10-1 Principle
Sudden immersion in cold water gives you three windows. Knowing them keeps panic from making your decisions for you:
11 MINUTE of cold shock — gasping and hyperventilation. Get your breathing under control. Do NOT try to swim through it. Float first.
1010 MINUTES of meaningful movement — before cooling muscles fail (swim failure). Self-rescue in this window, or get stable on flotation.
11 HOUR before hypothermia incapacitates — in a PFD, you have time. Conserve heat and wait for rescue.
Cold shock kills swimmers: The involuntary gasp on entry can inhale water; hyperventilation plus frantic swimming ends in swim failure. The single most important skill is to FLOAT FIRST and breathe until the shock passes (about a minute).
Float First — Then Decide
- Float first: Lean back, keep the airway high, and ride out the first minute of gasping before doing anything else
- In a PFD, minimize heat loss:
- HELP position (Heat Escape Lessening Posture): knees drawn to chest, arms hugged tight against the sides, protecting the high-heat-loss areas (groin, armpits, chest)
- Huddle: Multiple people in PFDs press chest-to-chest in a tight circle — conserves heat and is easier for rescuers to spot
- Swim only with a clear, achievable target: Shore or boat you are confident you can reach within your ~10 minutes of useful movement. Otherwise, stay with flotation and conserve.
After Extraction
- Handle gently, keep horizontal if possible: A cold patient hauled out vertically or handled roughly can suffer cardiovascular collapse (rescue collapse)
- Treat per hypothermia staging: Dry, insulate, wrap, heat to the trunk — full staging and rewarming detail in Lesson 09
- Remember the drowning side: If they were struggling or submerged, they also get the post-submersion assessment and evacuation rules from the Drowning section
Lightning
Exposure Management: There is No Safe Place Outside
"When thunder roars, go indoors" has no wilderness equivalent — there is no lightning-safe position outdoors. Your job is to REDUCE risk, early:
- Move at the FIRST thunder: Get off ridges, peaks, and open water immediately — don't wait for the storm to arrive
- Avoid the tallest objects: Lone trees, poles, and summit blocks attract strikes; a uniform stand of smaller trees is lower risk
- Spread the group 20+ feet apart: One strike should not be able to take everyone down — spread out so uninjured members can give care
- Avoid cave mouths and overhangs: Ground current arcs across these gaps; a shallow rock overhang is worse than open low ground
- The lightning crouch is no longer emphasized: It offers little real protection. Repositioning EARLY beats crouching late — spend your effort getting off exposed terrain.
- The 30-minute rule: Wait 30 minutes after the LAST thunder before resuming exposed travel
Rivers & Bikes: Plan Around the Afternoon
- Open water is high-exposure: A raft mid-river is the tallest object around. At the first thunder, get boats to shore and the group off the water and away from the bank's lone trees.
- Exposed roads and ridgelines are high-exposure: Riders strung out along a ridge road are a line of isolated high points. Descend to lower terrain and shelter in a vehicle or building if one exists.
- Plan around afternoon storm patterns: In mountain terrain, thunderstorms build predictably in the afternoon. Schedule big water and exposed crossings for the morning; be off high ground by early afternoon.
Lightning Injuries
- How lightning kills: Cardiac arrest and/or respiratory arrest — the strike stuns the heart and the brain's breathing center. The heart may restart on its own while breathing does not; without rescue breathing, the victim arrests again from hypoxia.
- Keraunoparalysis: Temporary paralysis (often of the legs) with pale, pulseless-appearing, mottled limbs — frightening, but it usually resolves within hours
- Burns: Superficial "ferning" or feathering patterns (Lichtenberg figures) on the skin — usually minor. Lightning burns are typically NOT deep; the current flashes over the body surface.
- Ruptured eardrums: Very common — expect hearing loss and disorientation
- Confusion and amnesia: Victims may not remember the strike and may behave strangely
- Blunt trauma: Victims can be thrown — assess for fractures and head/spine injury as with any fall
REVERSE TRIAGE: Treat the Apparently Dead First
This is the signature lightning teaching point — the one rule that reverses everything else you've learned about triage:
- Normal triage: Multiple victims → treat the living who can be saved; the pulseless are usually beyond field help
- Lightning triage is REVERSED: Go FIRST to victims who appear dead (not breathing, no pulse)
- Why: Lightning arrest is typically a stunned heart or a stopped breathing center in an otherwise healthy person — resuscitation odds are unusually GOOD. Victims who are moaning, moving, or walking are already breathing and will very likely survive without immediate help.
- What to do: Rescue breathing for the apneic with a pulse; full CPR (see Lesson 03) for the pulseless
No residual charge: A lightning-strike victim carries NO electrical charge. They are safe to touch immediately — start care without delay. (Assess the ongoing storm risk to rescuers, but the victim's body is not a hazard.)
Evacuation After a Strike
- ALL lightning-strike patients get evacuated for medical evaluation — including those who seem completely fine
- Why: The heart's electrical system may be injured; delayed rhythm problems require cardiac monitoring that only a hospital can provide
- Document what you saw: strike, loss of consciousness, paralysis, memory gaps — it guides the receiving clinicians
Case Scenarios
Scenario 1: Raft Flip in a Rapid
Setting: Your raft flips in a Class III rapid. One swimmer rolls onto her back, feet downstream, then swims hard into an eddy and self-rescues. A second swimmer is briefly pinned against a rock mid-current before washing free; a throw rope brings him to shore. Twenty minutes later he is still coughing and says his chest feels "tight." Everyone is cold and wet. You are a half-day float from the take-out.
What Went Right:
- Swimmer 1 used the defensive swim position (on her back, feet up and downstream) through the rapid, then switched to an aggressive swim to reach the eddy — textbook self-rescue
- Nobody stood up in the moving water — the pinned swimmer stayed off his feet and was rescued by ROPE (throw) rather than by a swimming rescuer (go), following the rescue hierarchy
Post-Submersion Assessment:
- EVERYONE who swam gets assessed — count heads first, then check each swimmer's breathing, mental status, and injuries
- Strip wet clothes, insulate, and watch for hypothermia in all swimmers (see Lesson 09)
- Swimmer 1: asymptomatic after a brief swim — observe closely for 4-8 hours; evacuate if anything develops
The Evacuation Decision: Swimmer 2 is SYMPTOMATIC after submersion — persistent cough and chest tightness. Lung injury from aspirated water can progress over hours. He evacuates for medical evaluation: keep him at rest, watch his breathing rate, effort, and sounds continuously, and move toward definitive care now — do not "wait and see" overnight at camp. If his breathing deteriorates, this becomes an EMERGENT evacuation.
Scenario 2: Lightning Strike on an Exposed Ridge
Setting: An afternoon storm builds fast while your dual-sport group is strung out on an exposed ridge road. Thunder cracks; before the group can descend, lightning strikes nearby. One rider is down and not breathing. Another is conscious but confused, says he can't feel or move his legs, and has a feathery red pattern across his shoulder. A third rider is shaken but uninjured.
Scene First:
- The storm is still overhead — move everyone (patients included, if feasible) off the exposed ridge to lower terrain, and SPREAD uninjured group members 20+ feet apart so a second strike can't take down the rescuers
- Victims carry NO residual charge — touch and treat them immediately
REVERSE Triage:
- Go FIRST to the rider who appears dead. The confused rider is talking — he is breathing and can wait.
- Apneic rider: open the airway and check breathing and pulse. If he has a pulse but isn't breathing — rescue breathing (1 breath every 6 seconds). If pulseless — CPR starting with 2 rescue breaths, then 30:2, and an AED if by some chance one is available (see Lesson 03).
- Lightning arrest in a healthy rider has unusually GOOD resuscitation odds — this effort is worth everything you have
The Confused, Paralyzed Rider:
- Leg paralysis after a strike is most likely keraunoparalysis — temporary, and it usually resolves within hours. Reassure him, keep him still and warm, and reassess.
- He was also THROWN or fell — assess for blunt trauma and treat the feathery burn pattern (ferning) as the minor superficial finding it usually is
- Expect ruptured eardrums, confusion, and memory gaps — speak clearly, face-to-face
Evacuation: ALL struck riders evacuate for cardiac monitoring — including anyone who "feels fine." Wait 30 minutes after the last thunder before the group resumes exposed travel.
Knowledge Check
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Lesson Summary
Key Concepts
Drowning is fast and silent: vertical posture, head low, no waving, no yelling — count heads after every swim
"Dry drowning" and "secondary drowning" are not medical terms — what matters is symptomatic vs asymptomatic after submersion
Rescue hierarchy: talk, reach, throw, row, go — swimming rescue is the last resort; never become the second patient
Never stand up in moving water deeper than your knees (foot entrapment); swim OVER strainers, never under; PFDs always
Drowning CPR is ventilation-first: 2 initial rescue breaths, then 30:2 — hands-only CPR is NOT appropriate (Lesson 03)
Any symptoms after submersion = evacuate; asymptomatic = observe closely for 4-8 hours
Cold-water immersion: 1-10-1 — float first through cold shock; HELP/huddle in a PFD; most deaths are early drownings, not hypothermia
Lightning: move off ridges and water at the first thunder, spread the group 20+ feet, wait 30 minutes after the last thunder
Lightning multiple-victim triage is REVERSED: treat the apparently dead first — victims carry no charge and resuscitate well
Every lightning-strike patient evacuates for cardiac evaluation, even if they seem fine