Summer Heat in Mauritius: How to Protect Your Family’s Health
The Mauritius Meteorological Services (MMS) expects a summer warmer than normal, with humid, stifling days from around mid-December. Summer heat in Mauritius tires everyone, but for babies, older people and anyone with a chronic illness it can quickly become a medical problem. Here is how to tell heat exhaustion from heatstroke, who is most at risk, how to keep cool and when to call a doctor.
What the MMS Summer Outlook Says
In its Summer Outlook 2026–27, presented on 27 October, the MMS forecasts a summer warmer than normal under the influence of a strengthening El Niño. Maximum temperatures could reach 36°C, or 37°C in the most exposed areas (around 34–36°C in Port Louis), with some days about 3°C above normal. The hot period could run from around mid-December to the end of March, with high humidity and stifling conditions, especially in towns and poorly ventilated homes.
Rainfall from November to April is expected at about 80% of normal; reservoirs are already low and there are water supply difficulties. The first summer rains are expected in the last week of November, and short, intense downpours that can cause flash floods are becoming more frequent. The MMS advises regular hydration, well-ventilated homes and particular care for babies, older people and people in fragile health, and updates its outlook every month, so follow its official bulletins.
Heat Exhaustion or Heatstroke? Know the Difference
Heat illness ranges from mild to life-threatening.
Minor problems: cramps, heat rash and sunburn
Heat cramps are painful muscle spasms after effort in the heat: rest somewhere cool and drink. Heat rash, small itchy red spots common in babies, settles when the skin is kept cool and dry. Sunburn damages the skin and adds to fluid loss.
Heat exhaustion: the warning stage
Typical signs are:
- heavy sweating, with pale, clammy skin
- weakness, tiredness and dizziness
- headache, nausea or vomiting
- muscle cramps and a fast pulse
Move the person somewhere cool, loosen tight clothing and let them lie down with their legs slightly raised. Give small, frequent sips of water or oral rehydration solution, and cool the skin with a damp cloth and a fan. If they are not clearly better within 30 minutes, call a doctor; if they get worse or become confused, treat it as heatstroke.
Heatstroke: a medical emergency
In heatstroke the body can no longer control its temperature, which can climb to 40°C or more and harm the brain and other organs. Watch for:
- very hot skin, which may be red and dry as sweating can stop (some people still sweat)
- confusion, agitation or slurred speech
- fainting, a seizure or loss of consciousness
Heatstroke is a medical emergency: the person needs hospital emergency care immediately. While getting help, move the person somewhere cool, remove extra clothing and cool them fast: wet the skin with cool water, fan continuously and put cold wet cloths on the neck, armpits and groin. Give no drinks to someone who is confused or drowsy, as they could choke. If they are unconscious but breathing, lay them on their side.
Who Is Most at Risk?
Some people become ill faster, or show it less clearly:
- babies and young children
- people over 65, who often feel less thirsty
- pregnant women
- people with heart, kidney or lung disease, or diabetes
- people taking certain medicines, such as diuretics (“water pills”) and some blood pressure medicines
- outdoor workers and people who do sport
- people who live alone
If you take regular treatment, or have been told to limit fluids because of heart or kidney failure, ask your doctor how the heat affects you and how much to drink. Never stop or change a medicine on your own.
How to Protect Your Family from the Heat
At home
- Drink regularly, before you feel thirsty: water rather than sugary drinks or alcohol.
- Keep oral rehydration salts in the home medicine box and prepare them exactly as the packet says.
- Ventilate early morning and evening; close shutters and curtains during the day.
- Take cool showers, wear light, loose clothing and eat lighter meals.
At work and outdoors
Planters, builders, fishermen and delivery riders spend long hours in the sun. Where possible, avoid hard effort roughly between 11:00 and 15:00 and do heavy tasks early or late in the day. Drink small amounts often, rest in the shade, and wear a hat and sunscreen. Watch colleagues, especially newcomers not yet used to the heat. Do sport early or in the evening.
Babies and children
Keep young children out of direct sun, dress them lightly and offer drinks often. Breastfed babies may want to feed more often; ask a doctor before giving water to a young baby. Never leave a child, an older person or a pet in a parked car, even briefly: it heats up very fast. A child who is drowsy, unusually irritable, has fewer wet nappies or a fever should see a doctor.
Older relatives and neighbours
Older people may not realise they are getting too hot. During hot spells, call or visit relatives and neighbours who live alone every day: check that they are drinking, that the home is ventilated and that they have their usual medicines. Sudden confusion, unusual weakness or a fall can be the first sign of heat illness. Our elderly home doctor service also helps keep chronic conditions stable through the summer.
Water Cuts, Mosquitoes and Food Safety
With less rain and low reservoirs, many households will store water. Use clean containers with a tight lid, and empty and scrub them regularly: uncovered water in buckets, drums or tanks is a breeding site for the mosquitoes that carry dengue and chikungunya. See our mosquito protection guide for families and our guide to dengue fever in Mauritius. If unsure whether stored water is safe to drink, boil it or use bottled water.
Heat also helps bacteria multiply in food. Refrigerate leftovers quickly, don’t leave rice, meat or seafood out for hours at family gatherings or beach picnics, and keep a covered container of clean water for handwashing during supply cuts. Diarrhoea and vomiting dehydrate fast in the heat: see our guide to gastroenteritis at home.
When to Call a Doctor
Call a doctor if:
- heat exhaustion is not clearly better after 30 minutes of rest, cooling and fluids
- there are signs of dehydration, such as little or dark urine, a dry mouth or dizziness on standing
- vomiting means fluids can’t be kept down
- an older person is unusually confused or weak
- a child has a fever
- a chronic illness is getting worse in the heat
Sudden confusion with very hot skin, fainting or a seizure may be heatstroke: the person needs hospital emergency care immediately.
Médecin à Domicile doctors visit 24/7, weekends and public holidays included, island-wide, and speak English, French and Creole. The doctor examines the patient, assesses dehydration and reviews regular medicines and, if someone cannot keep fluids down, can give IV rehydration at home when appropriate. A visit costs Rs 3 000 by day (08:00–18:00) and Rs 4 000 at night (18:00–08:00); eligible Eagle Insurance and Jubilee Insurance members are seen cashless. See our home doctor price guide, or call 86121.
Frequently Asked Questions
What is the difference between heat exhaustion and heatstroke?
Heat exhaustion is the warning stage: heavy sweating, weakness, dizziness, headache, nausea and a fast pulse, but the person stays alert and usually improves with rest, cooling and fluids. Heatstroke is an emergency: the skin is very hot, sometimes dry, and the person becomes confused, faints or has a seizure. It needs hospital care without delay; start cooling them straight away.
How much should I drink when it is very hot?
Needs depend on age, size, activity and health. Drink regularly without waiting for thirst, and more if you sweat a lot. Pale yellow urine is a good sign; dark urine means you need more. If your doctor has told you to limit fluids, ask them what is right for you in hot weather.
Can my medicines make the heat more dangerous?
Some can. Diuretics (“water pills”), some blood pressure medicines and a few other treatments affect how the body handles heat and fluids. Do not stop them on your own, as that can be dangerous. Ask your doctor or pharmacist how your treatment affects your tolerance of heat and whether anything should change this summer.
What can a home doctor do for heat exhaustion or dehydration?
The doctor examines the patient, checks hydration, temperature and blood pressure, and looks for any sign that needs hospital care. They review regular medicines, such as diuretics, in light of the heat, can give IV rehydration at home when appropriate, and follow up older or chronically ill patients through the hot months.
Hot weeks ahead? 80,000+ families already rely on a doctor at home, one call away on 86121.
