Sun Safety and Heat Illness Prevention: What Every Family Needs to Know

Why the UK Still Needs This Guide

Many people in the UK underestimate sun and heat risk because the climate is temperate and genuinely hot days feel like exceptions. This underestimation is itself one of the reasons sun-related harm is so common: people are less prepared, less protected, and less alert to warning signs on the days when the sun is strongest. Climate change is making extreme heat events more frequent and more intense in the UK, and what was once an occasional hazard is increasingly a recurring summer reality.

Sunburn is not only painful in the moment. It is the primary environmental cause of skin cancer, and the UK has one of the highest rates of melanoma in Europe. Cumulative sun exposure over a lifetime matters significantly, and habits established in childhood, both protective and harmful, shape long-term skin cancer risk. Getting sun safety right for children is genuinely important preventive health work.

Understanding SPF and What It Actually Means

SPF (Sun Protection Factor) is a measure of how much longer protected skin takes to burn compared to unprotected skin. SPF 30 means skin takes thirty times longer to burn than it would without protection; SPF 50 means fifty times longer. In practice, SPF 30 blocks approximately 97 per cent of UVB rays, and SPF 50 blocks approximately 98 per cent. The difference between SPF 30 and SPF 50 is smaller than most people assume.

What matters more than the SPF number is consistent, adequate application. Most people apply only about a quarter of the amount needed to achieve the stated SPF. Apply generously to all exposed skin, including ears, the back of the neck, and the tops of feet, which are frequently missed. Reapply every two hours and after swimming, towelling, or sweating, because physical activity removes sunscreen regardless of its stated water resistance.

Broad-spectrum sunscreen protects against both UVA and UVB rays. UVB causes visible sunburn; UVA causes deeper skin damage and ageing and also contributes to skin cancer risk. Check that any sunscreen you use is labelled broad-spectrum or carries a four-star or five-star UVA rating in addition to the SPF rating.

Protecting Children

Children have thinner, more sensitive skin than adults and are more susceptible to sunburn. Babies under six months should be kept out of direct sunlight entirely; their skin is too sensitive for even high-SPF sunscreen to be relied upon, and shade and protective clothing are the appropriate protections for this age group.

For children over six months, SPF 50 broad-spectrum sunscreen should be applied to all exposed areas, with particular care given to the face, ears, shoulders, and the back of the neck. Protective clothing, including long-sleeved rash vests for swimming, wide-brimmed hats that shade the face and neck, and UV-protective sunglasses for school-age children, supplement sunscreen rather than replacing it.

The hours between 11am and 3pm carry the strongest UV radiation in the UK during summer months. Scheduling outdoor activities for earlier in the morning or later in the afternoon, and finding shade during midday hours, is the most effective single protective strategy, particularly for young children who cannot reliably communicate that they are hot or uncomfortable.

Recognising Heat Exhaustion

Heat exhaustion occurs when the body overheats and cannot cool itself effectively. It is a medical condition that requires prompt action, though it is not immediately life-threatening if treated quickly. Symptoms include: heavy sweating, pale and clammy skin, fast and weak pulse, nausea or vomiting, muscle cramps, dizziness, headache, and fatigue. The person may feel faint and may be confused.

Treatment involves moving the person to a cool environment immediately: indoors with air conditioning if available, or shade with good airflow. Loosen or remove excess clothing. Apply cool, wet cloths to the skin, particularly the neck, armpits, and groin where large blood vessels are close to the surface. Give cool water to drink if the person is conscious and able to swallow. Most people recover within thirty minutes with appropriate treatment.

Call 999 if the person does not improve within thirty minutes, loses consciousness, becomes confused or stops responding, or if their temperature continues to rise. Heat exhaustion that is not treated effectively can progress to heatstroke.

Heatstroke: A Medical Emergency

Heatstroke occurs when the body's temperature regulation system fails completely and core body temperature rises to dangerous levels. It is a medical emergency. Symptoms that distinguish heatstroke from heat exhaustion include: hot, dry skin rather than sweaty and clammy skin; very high body temperature; confusion, slurred speech, or unconsciousness; and seizures.

Call 999 immediately if you suspect heatstroke. While waiting for the ambulance, move the person to the coolest available environment, apply cool water to the skin, fan them continuously, and place ice packs under the armpits and in the groin if available. Do not give anything by mouth to someone who is confused or unconscious.

Older adults, young children, and people with certain medical conditions including heart disease, kidney disease, and obesity are at higher risk of both heat exhaustion and heatstroke. Check on elderly neighbours and relatives during hot weather and ensure they have access to cool environments, adequate fluids, and are not taking medications that impair heat regulation without appropriate precautions.

Hydration and Practical Daily Habits

Dehydration significantly increases risk of heat illness. Drink water consistently throughout hot days rather than waiting until you feel thirsty; thirst is a late indicator of dehydration. Pale yellow urine indicates adequate hydration; dark yellow or amber indicates you need to drink more. Alcohol and caffeinated drinks contribute to dehydration and should not be relied upon for fluid intake on hot days.

Check the UV index before spending time outdoors; it is available on most weather apps and tells you how strong UV radiation is on a given day. A UV index of 3 or above warrants sun protection measures. In the UK, the UV index regularly reaches 6 to 8 during summer months, which is high enough to cause sunburn in unprotected skin within fifteen to thirty minutes.