The Cold Snap on the Ridge Traverse

Priya shows uncontrolled shivering, loss of fine motor control, slurred speech and altered judgement ('I'm fine') - these are signs of moderate hypothermia, not mild. Mild hypothermia typically presents with shivering but preserved coordination and clear thinking; the slurred speech and irrational self-assessment indicate progression, and the paradox of feeling 'fine' can reflect deteriorating judgement rather than improvement.

Immediate actions in the first 15 minutes:

1. Stop the group in the most sheltered spot available, ideally out of wind, and deploy the bothy bag around Priya and the two mildly cold students.
2. Insulate from the ground (packs, mats), remove wet outer layers, add dry fleeces and a hat, and share body heat if shivering continues.
3. Give warm sweet fluids only if Priya is alert and can swallow safely; avoid alcohol and avoid rubbing limbs.
4. Do not walk her onward while she is deteriorating; movement in moderate hypothermia risks cold blood returning to the core and cardiac instability.
5. Call for help early by radio, giving location, numbers, symptoms and weather.
6. Monitor responsiveness, shivering and breathing continuously and record times.

The reasoning is that the decision is driven by patient status, not distance to camp - the campsite is irrelevant if the casualty is worsening.

Option A: forward to the next campsite (4 km, 2 hours in good conditions). With the group at 1 km/h in these conditions, this is realistically 4+ hours - beyond daylight - on an exposed saddle with a casualty who cannot safely walk. The forward route keeps the group high and exposed longer, increasing risk to the two mildly cold students. However, it reaches a known campsite with better shelter and water if the group can move efficiently.

Option B: back to the sheltered valley camp (3 km, 1.5 hours). This is shorter, descends out of the wind, and reaches shelter sooner. The trade-off is retreating from the planned route and potentially losing a day, plus the descent may be slippery in rain.

Recommendation: Option B, because the priority is removing the group from the hazard and getting the casualty to shelter, and the valley camp achieves this sooner with less exposure. The lost day is a planning consequence, not a safety failure. The teacher should also consider splitting the group only if a competent adult can escort the casualty while the rest continue - but with two mildly cold students and poor visibility, keeping the group together is safer. The radio call should proceed regardless, so external help can meet the group at the valley camp.

Planning failures include:

• Forecast interpretation: a front arriving early should have prompted a lower, shorter day or an earlier start; the group was committed to an exposed saddle when conditions changed.
• Turnaround criteria: no pre-agreed trigger (e.g. visibility below 100 m, wind above 40 km/h, or any hypothermia sign) meant the decision was made under stress rather than in advance.
• Clothing and group checks: Priya's deterioration suggests inadequate layering or missed early signs; regular checks (every 30–45 minutes) with direct questions and observation of coordination would have caught it sooner.
• Group pacing: the pace drop to 1 km/h was a warning sign that should have triggered a reassessment before the casualty became moderate.
• Contingency planning: alternative routes and bail-out points should be mapped and briefed, with radio check-in times.

Corrections: brief the group on early hypothermia signs, set explicit weather and turnaround thresholds, schedule regular welfare checks, carry group shelter and spare insulation accessible (not buried), and rehearse the 'stop–shelter–assess–communicate' sequence.