Heat exhaustion or dehydration in Malta? Symptoms, first aid and when to see a doctor

Mild dehydration may improve with rest and fluids. Heat exhaustion requires prompt cooling and observation. Heatstroke is a medical emergency. Understanding the difference can help you respond safely.

This article provides general information only. Severe or rapidly worsening symptoms require urgent medical attention.

Why is dehydration common in Malta?

The body loses water through sweating, breathing, urination, vomiting and diarrhoea. In hot weather, sweating can increase substantially as the body attempts to cool itself. The risk is higher when someone:

• Spends prolonged periods in direct sunlight
• Walks or exercises during the hottest part of the day
• Drinks alcohol or does not drink water regularly
• Has vomiting, diarrhoea or a fever
• Is taking certain medicines
• Is pregnant, elderly or very young
• Has heart, kidney or other chronic health conditions

Malta's current public heat guidance recommends drinking water regularly, avoiding alcohol and caffeinated or sugary drinks, limiting exposure during peak heat hours and reducing strenuous activity.

What are the early signs of dehydration?

Mild or moderate dehydration may cause:

• Thirst and dry mouth
• Headache
• Tiredness or weakness
• Dizziness
• Reduced urination or darker urine
• Reduced concentration
• Dry skin
• Muscle cramps or nausea

The underlying cause matters. A person with persistent vomiting or diarrhoea may lose both fluid and electrolytes and may deteriorate even after attempting to drink water.

What is heat exhaustion?

Heat exhaustion occurs when the body struggles to cope with heat and fluid loss. Possible symptoms include:

• Heavy sweating
• Weakness and extreme fatigue
• Dizziness or faintness
• Headache
• Nausea or vomiting
• Muscle cramps
• Rapid pulse
• Cool or clammy skin
• Irritability

The World Health Organization notes that heat can cause weakness, headache, cramps, lethargy, irritability and swelling, while severe heat exposure can place major strain on the heart and other organs.

What is heatstroke?

Heatstroke is the most dangerous form of heat illness. It occurs when the body can no longer regulate its temperature effectively. Warning signs may include:

• Very high body temperature
• Confusion, disorientation or agitation
• Collapse
• Seizure
• Loss of consciousness
• Hot skin
• Severe weakness or rapid deterioration

Heatstroke is a medical emergency and can be fatal without prompt treatment. Call 112 immediately when heatstroke is suspected.

What should you do for possible heat exhaustion?

Move the person to a cooler location immediately. Then:

• Help them lie or sit down
• Remove unnecessary outer clothing
• Cool the skin with cool water
• Use wet towels or cold packs
• Fan the person
• Move them into shade or air conditioning
• Give small, regular sips of fluid if they are fully conscious
• Stay with them and monitor for worsening symptoms

Do not give anything by mouth to someone who is confused, unconscious or unable to swallow safely.

When should you call 112?

Call 112 immediately for:

• Confusion
• Collapse or loss of consciousness
• Seizure
• Severe breathing difficulty
• Very high temperature
• Inability to drink
• Rapid deterioration or suspected heatstroke

Continue cooling the person while waiting for help and follow the emergency operator's instructions.

When should you contact a doctor?

Arrange medical assessment when:

• Symptoms do not improve after moving to a cool place
• Dizziness persists or the person fainted
• The person repeatedly vomits or cannot keep fluids down
• Urination becomes very limited
• There is severe weakness or heart palpitations
• There is significant abdominal pain
• Symptoms followed alcohol use or recreational substances
• The patient has heart, kidney or other chronic conditions
• The patient takes diuretics or other relevant medication

See a doctor in St Julian's

Can you treat dehydration by drinking water?

Mild dehydration may improve with rest and gradual fluid intake. Small, frequent sips are often easier to tolerate than drinking a large amount quickly. However, water alone may not be enough when there has been:

• Repeated vomiting
• Significant diarrhoea
• Prolonged heavy sweating
• Serious heat illness
• Altered consciousness
• Significant electrolyte loss
• A medical condition affecting fluid balance

Do not force large quantities of fluid into someone who is nauseated, confused or medically vulnerable.

Are electrolyte drinks useful?

An oral rehydration solution may help replace water and salts after vomiting, diarrhoea or heavy sweating. The correct approach depends on age, medical history, kidney function, heart health, medication, the severity of symptoms and the cause of fluid loss.

People with kidney, heart or fluid-balance conditions should obtain individual advice rather than consuming large amounts of electrolyte products without guidance.

Does alcohol increase the risk?

Yes. Alcohol can contribute to fluid loss, affect judgment and make it less likely that someone recognises the early signs of heat illness. It may also encourage people to remain outdoors for longer or sleep in an overheated environment.

After a night in Paceville:

• Drink water gradually
• Avoid prolonged sun exposure
• Do not exercise intensely
• Stay somewhere cool
• Avoid more alcohol
• Seek medical advice for persistent vomiting, confusion or severe weakness

Coffee is not a treatment for heat illness or significant dehydration. Caffeine may worsen palpitations, anxiety or stomach discomfort, and Malta's heat guidance advises limiting caffeinated beverages during hot weather.

Can IV fluids help with dehydration?

IV fluids may be medically appropriate in selected cases, but they are not automatically required for every person who feels dehydrated. Before administering IV treatment, a clinician should assess:

• The cause of the symptoms
• Severity of dehydration
• Blood pressure and pulse
• Ongoing vomiting
• Medical history and current medication
• Heart and kidney health
• Whether blood tests are needed
• Whether hospital monitoring is more appropriate

A person with confusion, collapse or suspected heatstroke should not wait for a routine private IV appointment. Call 112. At Doctor St Julian's, any IV therapy is only offered after a medical assessment confirms it is clinically suitable.

IV fluids and rehydration

Who is at higher risk?

Heat can be particularly dangerous for:

• Older adults
• Babies and young children
• Pregnant people
• People with heart, kidney or diabetes conditions
• People taking certain medicines
• People with reduced mobility
• Outdoor workers and athletes
• Tourists not accustomed to Malta's climate

The WHO notes that extreme heat can worsen existing cardiovascular, respiratory, kidney and mental-health conditions.

How can visitors reduce the risk?

Avoid peak heat: Malta's public advice recommends avoiding unnecessary exposure around 11:00 to 16:00.

Drink regularly: do not wait until you feel extremely thirsty, and carry water when sightseeing or travelling by bus.

Wear suitable clothing: choose light, loose-fitting clothing, a hat and sunglasses, and use appropriate sun protection.

Plan breaks: spend time in shaded or air-conditioned places, and schedule long walks, running or exercise for cooler parts of the day.

Limit alcohol and check on vulnerable companions, including older relatives, children and anyone with a chronic condition.

What about sunburn?

Sunburn is different from heat exhaustion, although both can occur at the same time. Seek medical advice for:

• Extensive blistering
• Severe pain
• Fever or vomiting
• Confusion
• Signs of infection
• Burns covering a large area
• Significant sunburn in a baby or young child

Cool the skin gently, avoid further sun exposure and do not burst blisters.