Learn about the effects of heat on babies and small children. Get expert tips on how to protect your baby from heat exhaustion and over-heating when the weather's hot.
As summer temperatures climb all over the world, most families can't wait to get out of doors. But for toddler and infant parents, heat waves induce panic instead of pleasure. While adults tend to feel too hot at above 85°F (29°C), babies are even more vulnerable—so how hot is too hot for them to be outside?
Here's what pediatric experts recommend regarding heat exposure for infants, as well as some useful tips on how to keep your baby safe and cool when the weather is hot.
🔥When Is It Too Hot for Babies to Be Outside?
According to Children's Health, if the heat index (a measure which combines temperature and moisture) is above 90°F (32°C), infants shouldn't remain outside for extended periods of time.
Babies aren't as good at cooling down as grown-ups because they don't sweat normally," says Dr. Sushmita Yallapragada, M.D., Neonatologist and Associate Medical Director at Children's Health. "They're also not capable of letting you know if they're overheating."
💡What is the heat index?
Heat index captures how hot it feels when the humidity is taken into account. Always look at local weather apps or government forecasts for the heat index before venturing out with your baby.
🧒 Why Babies Are More Sensitive to Heat
Immature sweat glands: Babies are unable to regulate their temperature as well.
- High body surface area: Infants have a greater skin surface as a proportion of their weight, which makes them warm up more quickly.
- Limited communication: They cannot inform you if they are too hot or dehydrated.
🛡️Shield Your Baby from Hot Weather
Regardless of whether you live in a tropical region or you have an instant heatwave, the following are the required tips to ensure your little one remains shielded:
1. Seek Shade
- Stay under trees, sunshades, or umbrellas whenever going outdoors.
- Use stroller canopies to shield your baby from sunlight.
Note: Babies under 6 months should not be wearing sunscreen, the CDC recommends. Shade is your best option.
2. Dress for Heat
- Wear light-colored, loose-fitting clothes like cotton.
- Wide-brimmed hat and long-sleeved lightweight clothing offer sun protection.
3. Use Sunscreen (6 Months and Up)
- Apply broad-spectrum SPF 15 or higher.
- Apply every 2 hours, if your child is sweating.
4. Avoid Peak Sun Hours
- Stay indoors more during 10 a.m. to 4 p.m., when the sun is strongest.
- Early morning and late afternoon are best for outdoor play.
5. Offer Extra Rest
Sun and heat can tire babies quickly. Offer extra naps or quiet time after outdoor time.
6. Stay Hydrated Wisely
Infants under 6 months get hydration only from formula or breastmilk. Older infants may need small amounts of water—but only after consulting your pediatrician first.
🚨Warning Signs of Overheating in Babies
- Be vigilant for these signs of heat distress:
- Drowsiness or intermittent drowsiness
- Flushed cheeks (especially face, neck, or chest)
- Less hungry
- Excessive sweating
- Few wet diapers
- Vomiting or diarrhea
👉If your baby shows any of these signs:
- Bring them inside immediately
- Apply a cold, damp cloth to their skin
- Call your pediatrician if symptoms increase or persist or worsen
🌍 World View: Adapting to Regional Climates
No matter what the hot climate you're living in is - hot Australian summer, Indian monsoons, European or North American heatwaves - the same principles apply: Stay away from exposure, cool babies, and watch for warning signs.
✅ Final Tips: Quick Checklist for Parents
- [ ] Check the hot index before going outside
- [ ] Schedule early morning or late afternoon playtime
- [ ] Dress your baby in light, loose clothing
- [ ] Stay in the shade and away from direct sun
- [ ] Watch for symptoms of overheating
Keep yourself and your family safe this summer. For more parent-tested, expert-approved parenting tips, subscribe to our blog and follow us on social media.
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