Heat stroke is a life-threatening condition when the body overheats (often above 40 °c/104 °f) and can no longer cool down. It can be life-threatening if not treated quickly.

• Stay hydrated: drink water or cool fluids frequently, even if you’re not thirsty. Avoid sugary or caffeinated drinks that can dehydrate. Do not worry about drinking and needing the toilets as your body loses large amounts of water through sweating.
• Wear light clothing: choose loose, light-coloured, breathable fabrics (like cotton); cover your head with an umbrella (when in ihram) or hat. Sunglasses and sunscreen help too.
• Use shade and rest: avoid the midday sun (11 am–4 pm). Take breaks often in shaded or air-conditioned areas. Rest and cool off regularly between rituals. Perform prayers in the shade where possible.
• Plan cooler times: whenever possible, perform activities (like traveling between sites or camping) in early morning or late afternoon / evening when temperatures are lower.
• Cooling measures: carry a small spray bottle, damp towel, or handkerchief to place on your neck and face; mist yourself or use a fan. Stay out of hot vehicles without airconditioning.
• Replace salts and electrolytes: as you will sweat a lot, consider ORS (oral rehydration solution) or sports drinks and eat lightly salted snacks. This helps maintain your body’s salt balance and hence avoids muscle aches and exhaustion.
• Avoid drinking ice cold water / too many fizzy drinks as you may develop a sore throat/ chest infections.
• Look out for fellow pilgrims
  – Stay together: travel in groups or pairs. Regularly check on those in your group, especially the vulnerable elderly and children.
  – Share reminders: encourage each other to drink water and rest. Offer a drink, glucose tablets and share an umbrella with someone who looks overheated or tired.