Most parents know the drill when a kid gets too hot at the beach or overheats at an outdoor birthday party. Hand them some water, find shade, and maybe a popsicle.
A lot of the time, that works, and kids cool down.
But sometimes it doesn’t. And knowing the difference between those two situations — the cold drink fix and the 911 call — is one of the most important things a parent can know during the dog days of summer.
Two Different Things That Look Similar at First
Heat exhaustion and heat stroke are not the same condition. They exist on a spectrum, and one can quickly become the other. Where your child falls on that spectrum determines your next move.
Heat exhaustion is the body’s warning signal. It means your child is overheating and struggling to cool down, but their body is still fighting back. Signs include:
- Heavy sweating
- Cool, pale, or clammy skin
- Fast or weak pulse
- Nausea or vomiting
- Muscle cramps
- Tiredness, weakness, or dizziness
- Headache
- Fainting
At this stage, moving your child to a cool environment, removing excess clothing, and getting fluids in them can turn things around. The CDC recommends cool, damp cloths on the skin and sipping cool water or a sports drink with electrolytes.
If symptoms improve within 15 to 30 minutes, heat exhaustion was likely the culprit, and you handled it.
If they don’t (or they get worse) you’re no longer dealing with heat exhaustion.
When It Becomes an Emergency
Heat stroke is a medical emergency. It happens when the body’s internal temperature reaches 103°F or higher and the cooling system essentially breaks down. Call 911.
The warning signs look different and some are easy to miss:
- High body temperature (103°F or higher)
- Hot, red, dry, or damp skin — notably, sweating may stop entirely
- Rapid, strong pulse
- Confusion, slurred speech, or unusual behavior
- Loss of consciousness
- Seizures
That sweating point matters. A hot child who stops sweating isn’t just “dried out” — it can mean the body has lost its ability to regulate temperature. That’s what makes heat stroke so dangerous.
According to the Mayo Clinic, untreated heat stroke can cause damage to the brain, heart, kidneys, and muscles. The longer it goes unaddressed, the more serious the damage becomes.
If you suspect heat stroke: call 911 immediately. While you wait, move your child to a cool environment and try to lower their body temperature. Apply cool wet cloths, ice packs to the neck, armpits, and groin, or immersion in cool (not ice cold) water if available.
Do not give fluids to a child who is confused or unconscious.
Who Is Most at Risk
Heat stroke can happen faster than most parents expect. Some children are especially vulnerable:
- Infants and toddlers: their bodies heat up three to five times faster than adults and they cannot communicate symptoms clearly
- Children in hot cars: a car’s interior temperature can rise 20 degrees in just 10 minutes, even on a mild day. Never leave a child unattended in a vehicle, even briefly
- Kids with chronic conditions: heart conditions, obesity, kidney disease, or any condition affecting fluid balance can increase risk
- Children on certain medications: some antihistamines, diuretics, and psychiatric medications affect the body’s ability to regulate heat. Ask your pediatrician if any of your child’s medications fall into this category
- Athletes and active kids: kids pushing hard in heat and humidity can tip from heat exhaustion to heat stroke faster than they realize, especially if they’re not accustomed to the conditions
When to Call Your Pediatrician vs. When to Go Straight to the ER
Call your pediatrician if:
- Your child shows signs of heat exhaustion that improve with rest and fluids but you want guidance
- Your child recovered but seems off: extra tired, not eating, or still complaining of headache after a few hours
- You’re unsure whether what you observed was heat exhaustion or something else
- Your child has a chronic condition and you want to talk through heat safety precautions before they worsen
Go straight to the ER (or call 911) if:
- Your child’s temperature is 103°F or higher
- They are confused, disoriented, or unusually difficult to wake
- They stop sweating despite still being very hot
- They have a seizure
- They lose consciousness at any point
- Symptoms from heat exhaustion are not improving after 30 minutes of cooling and hydration
When in doubt, call. A quick phone call to your pediatrician’s after-hours line can help you make the decision — that’s what they’re there for.
What You Can Do Right Now
Prevention is always the better play. A few habits that make a real difference:
- Hydrate before you go outside. Don’t wait until your child says they’re thirsty. By the time they ask, they’re likely already mildly dehydrated
- Schedule outdoor time smartly. The hottest, most dangerous hours are typically between 10 a.m. and 4 p.m. Build in shade breaks and cool-down time
- Dress kids in lightweight, light-colored, loose clothing. It makes a meaningful difference in how quickly they overheat
- Know your child’s personal risk factors. If they have a condition or take a medication that affects heat tolerance, talk to your pediatrician before summer activities ramp up
- Check the back seat. Every time. Make it a non-negotiable habit regardless of how rushed or distracted you are
A Note on Trusting Your Instincts
Parents are often the first to notice when something is off. The glassy eyes, the sudden quiet, the kid who usually can’t stop moving, who is now slumped in a chair.
Trust that. Heat-related illness moves fast in children, and acting early is almost always the right call.
Your job isn’t to diagnose. It’s to pay attention and then get the right people involved quickly when something doesn’t feel right.
That’s not overreacting. That’s exactly what good parenting looks like.