Their bodies heat up faster and sweat less efficiently
As summer heat pushes past 30 degrees Celsius across the UK, parents are reminded that children are not simply small adults — their bodies warm faster and cool more slowly, leaving them quietly vulnerable in ways that can escalate before the signs are obvious. The wisdom gathered here is not new, but its timing is: the window before a heatwave is precisely when preparation becomes protection. From what children eat and wear to how their bedrooms breathe at night, the small choices made in ordinary moments carry unusual weight when the temperature climbs.
- Children's bodies heat up faster and sweat less efficiently than adults, making them genuinely more vulnerable during heatwaves — not just uncomfortable, but at real physiological risk.
- Sunscreen is being misapplied across the board: 'once-a-day' formulas and water-resistant labels create false confidence, while the ears, feet, and neck go unprotected.
- The midday window between 11am and 3pm is the most dangerous stretch, and covering prams with muslin cloth — a common instinct — actually traps heat and increases risk.
- Parents are being guided toward layered, practical strategies: hydrating through food, reapplying SPF 30+ every two hours, choosing loose UV-protective clothing, and shading rather than sunscreening babies under six months.
- Nights are emerging as a second front — closed blinds during the day, cool baths before bed, and open windows at night form a simple but effective system for helping children sleep through the heat.
When temperatures push past 30 degrees Celsius, the challenge for parents sharpens quickly. Children's bodies heat up faster and sweat less efficiently than adults, meaning they struggle to regulate themselves when the mercury climbs. Babies and young children are especially at risk — and the steps taken before the worst of the heat arrives matter more than most people realise.
Hydration is the first priority, but getting children to drink water is often a battle. A more effective approach is weaving water into foods they already enjoy — watermelon, oranges, jelly, soup, even ice cream. Breastfed babies get all the water they need from milk, though they may feed more often. Formula-fed babies can be offered cooled boiled water alongside their usual feeds.
Sunscreen demands more attention than its packaging implies. Once-a-day formulas and water-resistant labels offer less protection than advertised — sweating and towelling off reduce effectiveness quickly. The guidance is clear: SPF 30 with a four-star rating, applied thirty minutes before going outside, reapplied every two hours, and extended to the often-forgotten zones — ears, neck, feet, shoulders. Babies under six months should not use sunscreen at all; their skin is too delicate, and they should be kept out of direct sunlight entirely.
Shade is the simplest and most powerful tool. Between 11am and 3pm, keeping children indoors or in the shade is the easiest protection available. One important caution: covering a pram with a muslin cloth traps heat and blocks airflow, making conditions inside more dangerous, not less. If the park or beach is unavoidable, evening is the safer window.
Clothing choices carry real consequences. Loose-fitting fabrics allow air to move; tight ones trap heat. Dark colours and denser materials like denim offer better sun protection. UPF 50 swimwear, long-sleeved tops, and wide-brimmed hats — particularly legionnaire-style ones that cover the back of the neck — provide meaningful coverage. Wraparound sunglasses protect young eyes from UV damage.
Nights present their own challenge. Keeping blinds and curtains closed during the day helps maintain a cooler room. A fan can circulate air, though it shouldn't be pointed directly at a child's body. A cool bath before bed lowers core temperature and helps children settle. Leaving the door and window slightly open allows a breeze to move through — a small adjustment that can be the difference between rest and another sleepless, sweltering night.
The thermometer is climbing. By the end of the week, parts of the UK will see temperatures push past 30 degrees Celsius—the kind of heat that makes everyone irritable, keeps the house awake at night, and turns a simple afternoon into something that requires strategy. For parents, the challenge is sharper. Children's bodies work differently than ours. They heat up faster and sweat less efficiently, which means they struggle to cool themselves down when the mercury rises. Babies and young children are especially at risk, which is why the practical steps you take now—before the worst of it hits—matter more than you might think.
The first instinct is usually to push water. But getting a child to actually drink it can feel like a losing battle. A better approach is to work water into the foods they already want to eat. For older kids, load up on juicy fruits like watermelon and oranges. Salads, ice cream, jelly, and soup all count as hydration too. For babies who are breastfeeding, breast milk provides all the water they need, though they may want to feed more frequently than usual. If you're using formula, you can offer cooled boiled water alongside their regular feeds.
Sunscreen is the second line of defense, but it requires more attention than the marketing suggests. Those "once-a-day" formulas promise more than they deliver. Even sunscreen labeled water-resistant or water-repellent loses its effectiveness after swimming, toweling off, or sweating through the day. The standard advice is straightforward: choose a sunscreen with at least SPF 30 and a four-star rating, apply it generously about thirty minutes before heading outside, then reapply every two hours. The forgotten zones matter—tops of feet, around the ears, the neck, the shoulders. For babies under six months, sunscreen isn't recommended at all because their skin is too delicate. They should stay out of direct sunlight entirely. Darker skin tones need protection too, though families with pale skin, freckles, or a history of skin cancer should be especially vigilant.
The simplest protection is also the most obvious: shade. Between 11 in the morning and 3 in the afternoon, when the sun is strongest, keeping children indoors or in the shade is the easiest way to keep them safe. If you do venture out, bring a parasol or sunshade. One warning: don't cover a pram or pushchair with a muslin cloth or blanket, even in the shade. It traps heat and stops air from moving. If the children are desperate for the park or beach, wait until evening when the temperature drops.
Clothing matters more than you might expect. Loose-fitting clothes are essential—tight fabric traps heat against the skin. Dark colors provide better sun protection than light ones, and certain materials like denim and shiny polyester are thick enough to act as barriers. For water activities, UV-protective swimwear labeled UPF 50 is worth the investment. Long-sleeved tops with high necklines protect arms, backs, and shoulders. A wide-brimmed hat beats a cap or small bucket hat every time, and legionnaire-style hats that cover the back of the neck are ideal. Wraparound sunglasses protect the eyes from UV damage.
When night falls and it's time to sleep, the bedroom becomes the battleground. During the day, close the blinds and curtains to keep the room cool. An electric fan helps move air around, though don't point it directly at a child's body—that can actually dehydrate them. A cool bath before bed can lower their core temperature and help them settle. Once they're in bed, strip away unnecessary layers. Leave the door and window slightly open to let a breeze flow through. It's a small adjustment, but on a sweltering night, it's the difference between rest and another hour of everyone lying awake, waiting for morning.
Citações Notáveis
Their bodies heat up more quickly than adults' and they sweat less, making it more difficult for them to cool down.— Health guidance on child physiology during heat
A Conversa do Hearth Outra perspectiva sobre a história
Why do children struggle so much more with heat than adults do?
Their bodies simply aren't as efficient at cooling themselves. They heat up faster and their sweat response is weaker, so they can't regulate temperature the way we do. That's why the same conditions that make an adult uncomfortable can actually put a child at risk.
The advice about water through food instead of drinking it—is that just a workaround, or is there something real there?
It's both. Yes, it gets around the resistance kids have to plain water. But it also works because those foods have high water content and come with other nutrients. It's not a trick; it's just meeting them where they are.
What's the real problem with those once-a-day sunscreens?
They're marketed as a convenience, but the science doesn't support it. Sweat, water, toweling off—all of it degrades the protection. You have to reapply, and that's the honest answer, even if it's less convenient.
Why is covering a pram with a cloth such a common mistake?
It seems protective, right? You're shading the baby. But you're also creating a sealed environment. Heat builds up inside, and there's no airflow. It can actually make things worse.
Does skin tone change the sun protection advice?
The fundamentals stay the same—everyone needs protection. But some skin types are more vulnerable to damage and skin cancer. Families with that history or with pale skin need to be more rigorous about it.
What's the one thing parents most often forget about when they're thinking about heat safety?
The bedroom setup. People focus on daytime protection, but then the child can't sleep at night because it's too hot. A cool bath, open windows, minimal layers—those things matter as much as anything you do outside.