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pediatric-safety

Sun Safety and Heat Illness in Children

Infants burn quickly and overheat faster than adults. Keep babies under 6 months out of direct sun; use shade and protective clothing first. Know the signs of heat exhaustion and heat stroke — heat stroke is an emergency. A parked car can exceed 120°F within 20 minutes.

Sunscreen and sun protection by age

For infants under 6 months, the AAP recommends keeping them out of direct sunlight as much as possible — shade, protective clothing, and wide-brimmed hats are the primary tools 1. Small amounts of mineral sunscreen (zinc oxide or titanium dioxide) may be used on exposed skin when shade is not available, but the general recommendation is shade and clothing first 1.

For children 6 months and older, broad-spectrum sunscreen with at least SPF 30 is appropriate, applied 15–30 minutes before sun exposure and reapplied at least every 2 hours, or after swimming or sweating 1. Mineral sunscreens (zinc oxide and titanium dioxide) are generally well tolerated on sensitive skin. Clothing with built-in UV protection (UPF-rated) is an effective alternative to sunscreen for covered areas. Spray sunscreens should not be inhaled and should not be applied directly to the face.

Heat exhaustion: early warning signs

Heat exhaustion occurs when the body is working hard to cool itself but struggling. Signs include heavy sweating, pale or cool and clammy skin, fast or weak pulse, nausea, muscle cramps, and fatigue or weakness 2. A child may be dizzy or confused. The response is to move the child to a cool environment, offer cool fluids if the child is alert and able to drink, and remove excess clothing. Cool cloths to the neck, armpits, and groin can help. Heat exhaustion addressed promptly usually resolves without long-term effects, but if symptoms do not improve quickly or the child progresses to more severe signs, emergency care is needed.

Heat stroke: a medical emergency

Heat stroke is distinguished from heat exhaustion by a very high body temperature (often above 104°F / 40°C), altered mental status (confusion, agitation, or loss of consciousness), and skin that may be hot — though it can still be wet with sweat 12. A child who is confused, difficult to rouse, having a seizure, or unconscious in a hot environment needs 911 and active cooling simultaneously. Cooling measures should begin immediately while waiting for help: move to a cool environment, apply cool water or ice packs to the neck, armpits, and groin, and fan the child. Heat stroke can cause organ damage and is life-threatening.

Hot cars: a specific, preventable hazard

The interior of a parked car on a warm day can exceed 120°F within 20–30 minutes, even on mild days and even with windows cracked 1. Children's core temperatures rise 3–5 times faster than adults'. Children die in hot cars in the US every year, and the majority involve a caregiver who believed the child was not in the vehicle. Strategies families use to prevent this: placing a phone or purse in the back seat as a reminder, and making "check the back seat" a universal habit on every trip. If a child is found in a hot car, call 911 immediately and begin cooling the child. Bystanders who observe a child alone in a hot car should call 911 1.

Keeping cool: practical heat prevention

During heat advisories, children should be kept in cool environments during the hottest part of the day (typically late morning through early afternoon). Lightweight, light-colored, loose clothing reduces heat absorption. Young children do not have the same thirst drive as adults and may not ask for water even when dehydrated — offering fluids regularly during outdoor activity on hot days is an important routine 1. Avoid vigorous outdoor activity when the heat index is at or above 90°F.

Common questions

Can I use adult sunscreen on my toddler?

For most children over 6 months, adult broad-spectrum SPF 30+ sunscreen is generally appropriate. Mineral sunscreens (zinc oxide or titanium dioxide) tend to be better tolerated on sensitive skin. Avoid sunscreens with fragrances if the child has sensitive skin. Products marketed for babies often have a simpler ingredient list, but the key specifications are broad-spectrum coverage and SPF 30 or higher.

How do I know if my toddler is overheating at the beach or park?

Early signs of overheating include flushed or pale skin, more than usual sweating, irritability, and fatigue. A child who stops playing, wants to be held, seems unusually fussy, or is less alert than normal in hot weather may be showing early heat illness signs. Moving to a cool area and offering fluids is the right response.

Is it ever safe to leave a child in a car briefly?

The AAP recommends against leaving children alone in cars, including for brief stops. Car interiors heat very rapidly, and children's core temperatures rise 3–5 times faster than adults'. What is planned as one minute can easily become longer — and even a few minutes in extreme heat can be dangerous for a young child.

Can infants under 6 months get sunscreen?

The AAP recommends keeping infants under 6 months out of direct sun and using shade and protective clothing as the primary tools. If direct sun exposure is unavoidable, small amounts of mineral sunscreen on exposed areas may be used, but the general recommendation is shade and clothing first.

When to get care right away

  • —Child is confused, difficult to rouse, or unconscious in a hot environment — call 911 immediately
  • —Child has a very high body temperature with hot skin and is not sweating
  • —Child is having a seizure in the heat
  • —Infant appears very lethargic, floppy, or has stopped crying in a hot environment
  • —Child found alone in a hot vehicle

Call 911 immediately for any child with confusion, high temperature, seizure, or loss of consciousness in a hot environment. Begin cooling (move to shade/cool area, apply cool water to neck, armpits, groin) while waiting for help.

This article provides general safety information and is not medical advice for any individual child. Heat stroke is a medical emergency — do not delay calling 911 to consult this or any other resource.

References

  1. 1.American Academy of Pediatrics (2024). Extreme Heat: Tips to Keep Kids Safe When Temperatures Soar. HealthyChildren.org. link ✓AAP guidance on heat stroke signs, hot car danger (interior temperatures exceeding 120°F), recommendation never to leave children in cars, children's faster temperature rise, and heat prevention during advisories
  2. 2.American Academy of Pediatrics (2024). Summer Sun, Heat & Air Quality: Tips to Keep Kids Safe. HealthyChildren.org. link ✓AAP sunscreen guidance: infants under 6 months avoid direct sun, shade and clothing first; SPF 30+ broad-spectrum for children 6 months+; mineral sunscreens (zinc oxide/titanium dioxide) preferred; reapply every 2 hours

2 sources, numbered by first appearance. General health information, not medical advice — synthetic demonstration content.