If someone is seriously unwell right now: stop reading, call 998 (ambulance). This page is awareness for desert trips, not medical training — it summarises published first-aid guidance (NHS, and NHS-adapted sources, as reviewed May 2026) in our own words, adds the desert-specific realities we drive with, and replaces neither a course nor a professional.

Two conditions, one clock

Heat exhaustion is the body struggling but still coping. Heat stroke is the cooling system failing — a genuine life-threatening emergency. The line between them is drawn by a clock: treat heat exhaustion properly and the person should start to feel better within about 30 minutes. Not improving — or showing any brain sign at any moment — means you are no longer looking at heat exhaustion.

Spot heat exhaustion early

The textbook signs, desert edition — and watch your group, not just yourself:

  • Tiredness out of proportion, dizziness or faintness, headache.
  • Feeling sick; cramps in arms, legs or stomach.
  • Heavy sweating with pale, clammy skin; intense thirst.
  • Fast breathing, racing pulse.
  • In a convoy it looks like: someone gone quiet on the radio, sloppy driving, “I just need a minute” at every stop.
  • Children, older people, and whoever is working hardest in the heat — usually the one digging — go downhill fastest.

Treat it: the 30-minute rule

Act immediately; this is fixable in the field:

  1. Stop the activity, move them somewhere cool — shade, a tarp, or the desert’s best first-aid room: a car with the AC running.
  2. Strip the excess — jackets, boots, anything trapping heat.
  3. Cool the skin: spray or sponge with water and fan them; lay on a soaked shirt; wrapped cold packs (never direct on skin) at armpits and neck.
  4. Fluids, sipped not chugged — water, or better a rehydration/electrolyte drink from the kit.
  5. Stay with them, keep cooling, watch the clock.

They should start to feel better within 30 minutes. When they do: that person is done for the day — no more driving, digging or riding, and they stay out of the heat. A second episode the same day hits harder.

Heat stroke: the 998 call

Call 998 immediately if any of these:

  • No better after 30 minutes of rest, cooling and fluids.
  • Very high temperature; skin hot to touch — and if sweating has stopped while they’re burning up, that’s a late, dangerous sign. (In dry desert air, don’t rely on the sweat sign alone — it evaporates as it forms.)
  • The brain misbehaving: confusion, slurred words, clumsiness, unexplained aggression.
  • Fast breathing or breathlessness, a seizure, fainting or unresponsiveness.

While the ambulance is coming — cool like it’s the treatment, because it is: into the AC car or deepest shade; clothes off to underwear; douse with water from the jerry cans; wet cloths replaced as they warm; fan continuously; wrapped cold packs to armpits, neck and groin. Fully alert → small sips. Confused or drowsy → nothing by mouth. Unresponsive but breathing → recovery position (on their side, head back, airway open), keep cooling, stay on the line. And a specific don’t, per NHS-adapted guidance: no paracetamol or aspirin for heat — it won’t lower this kind of temperature and can do harm.

Getting the ambulance to a dune field is its own skill — the calling-for-help guide covers sharing your exact position.

Why the desert makes this sneaky

  • Dry air hides sweating. You lose litres without feeling wet. The absence of visible sweat reassures exactly when it shouldn’t.
  • Exertion spikes it. Digging, winching, pushing — exertional heat stroke drops fit young people who felt fine ten minutes earlier. The person who dug out the car is the patient to watch.
  • The car is your cooling room. AC on full, vents at the casualty, doors shut. Use it early and without embarrassment — it’s the best piece of first-aid equipment in the desert.
  • Prevention is trip design: season, timing, water discipline — the heat-and-water guide and when not to go are the upstream half of this page.

This page summarises published first-aid guidance current as of May 2026 in our own words and does not replace training — a half-day first-aid course beats every article ever written, including this one. Nothing here asserts that desert heat is manageable-safe: the UAE summer kills fit people, the reliable strategy is not being out in it, and 998 outranks every step above the moment doubt appears.