Heat Exhaustion and Heat Stroke: What to Watch for at the Beach

Every summer someone on the beach — usually a kid who’s been running around for hours or a grandparent sitting in full sun — starts looking off. Maybe they go pale, or their eyes get glassy, or they’re suddenly not making total sense when they talk. Most of the time it’s heat exhaustion. Sometimes it’s worse. Either way, knowing the difference between heat exhaustion and heat stroke could be the thing that keeps your vacation from becoming a trip to the ER.

The Jersey Shore in July and August is genuinely hot. Toms River, just a few miles inland from Seaside Heights, has hit 101°F on August days when the coast was in the mid-80s. The sea breeze helps us here on the barrier island — and I’m grateful for it — but it doesn’t save you if you’re sitting in direct sun from 10am to 4pm without water, without shade, and without a break. Humidity in July can push the heat index well past what the thermometer says. Your body is working harder than you realize.

The Difference Between Heat Exhaustion and Heat Stroke

These two conditions are on the same spectrum, but they are not the same emergency. Heat exhaustion is serious. Heat stroke is life-threatening.

Heat Exhaustion: Your Body Is Struggling

Heat exhaustion happens when your body loses too much water and salt through sweat and can’t cool itself down efficiently. Your core temperature rises, but typically stays below 104°F. The key thing here: your brain is still working. You might feel momentarily confused, dizzy, or foggy, but you know what’s going on around you.

Signs of heat exhaustion:

• Heavy sweating
• Cool, pale, clammy skin
• Fast but weak pulse
• Dizziness or lightheadedness
• Headache
• Nausea or vomiting
• Muscle cramps (especially in the legs)
• Fatigue and weakness
• Feeling very thirsty

If you catch it here, you can usually manage it yourself. Get out of the sun immediately. Move to a shaded area or somewhere air-conditioned — our rental is three blocks from the beach, and bringing your family back here to cool down is always the right call. Have the person lie down with their feet slightly elevated, which helps blood get back to the heart. Give them cool water or a sports drink with electrolytes. Apply cool, wet cloths to the skin, especially the neck, wrists, and forehead.

If the person isn’t feeling better within 30 minutes and has a temperature, consider going to the ER or an urgent care.

Heat Stroke: Call 911

Heat stroke is when the body’s cooling system fails completely. Core temperature spikes above 104°F — sometimes reaching 106°F within minutes. This is a medical emergency. Without immediate treatment, heat stroke can cause permanent organ damage or worse.

The defining sign that separates heat stroke from heat exhaustion is brain dysfunction. Someone having heat stroke may:

• Be confused, agitated, or aggressive
• Slur their speech
• Lose consciousness or faint
• Have hot, red skin that’s either dry or damp (this trips people up — you don’t have to stop sweating for it to be heat stroke)
• Have a rapid, strong pulse
• Experience nausea or vomiting

One other thing that catches families off guard: goosebumps. The person might feel like they have chills even though their body is dangerously overheated. And in kids, watch for a belly that feels hot to the touch while their arms and legs are cooler — that temperature mismatch is a red flag.

If you see these signs: call 911 immediately. Do not wait to see if they improve. While waiting for help, move the person to shade or air conditioning, remove outer clothing, and apply cool water or wet cloths to the skin. Do not give fluids to someone who is unconscious or confused.

Why the Beach Is Particularly Risky

People assume the ocean breeze keeps things safe. It does help — and I’ve definitely appreciated a good sea breeze on a scorching August afternoon. But there are a few things about a beach day that actually work against you.

Reflected heat. Sand reflects and radiates heat back up at you from below. You’re getting sun from above and radiant heat bouncing up from the ground at the same time.

UV exposure. New Jersey’s UV index hits 9–10 in July, which the National Weather Service classifies as “very high.” Unprotected skin can burn in under 15 minutes. Sunburn compromises your skin’s ability to regulate temperature, which directly increases heat illness risk.

Dehydration sneaks up. You’re swimming, you’re in a breeze, you don’t feel like you’re sweating as much. But you are. Salt water pulls moisture from your skin. Kids are terrible at drinking water when they’re having fun. By the time anyone says they’re thirsty, they’re already a few steps down the dehydration path.

Alcohol. This is less about the kids and more about the adults. Alcohol dehydrates you and impairs the body’s ability to regulate temperature. A few drinks on the beach in the afternoon, in full sun, is a genuine risk factor for heat exhaustion — and adults are not always as self-aware about their symptoms in that situation.

Long days in the sun. Families planning a full beach day from 9am to 5pm are spending six-plus hours in conditions that most bodies weren’t designed to handle without breaks. That’s a long time.

Kids and Older Adults: Higher Risk, Faster Onset

Kids and seniors are more vulnerable to heat-related illness, and they get sicker faster than healthy adults in middle age. With young children, the signs can be harder to read. An infant who’s overheating may have a sunken soft spot on the top of the head, fewer wet diapers, or fussiness they can’t explain. Older toddlers and kids might just seem suddenly cranky, lethargic, or stop playing — which can look like they’re just tired.

With grandparents and older guests, medications are a real factor. Certain common prescriptions — antihistamines, blood pressure medications, diuretics, antidepressants — affect the body’s ability to sweat and regulate temperature. If someone in your group takes any of these, they need extra vigilance in the heat. The CDC’s heat illness guidance has a more complete list.

How to Keep Your Family Safe at the Beach

Most of this is stuff your mom told you. The hard part is actually doing it when you’re on vacation and everyone wants to be out there.

Time the sun. The highest UV and hottest temperatures hit between 10am and 4pm. If you get out by 9am and come back in during midday, you can go back out in the late afternoon when the sun angle drops and temperatures ease off. This is my personal strategy — early beach, back to the rental for lunch and downtime, back out around 4pm.

Drink water before you’re thirsty. Thirst means you’re already dehydrated. Bring a big water jug to the beach. A good target is 8 ounces of water roughly every 20 minutes for anyone who’s active. For kids, set a timer if you have to.

Build in shade breaks. If you’re renting a beach umbrella, use it. If your kids are teenagers who refuse to sit under an umbrella, at minimum get them out of direct sun for some portion of the hottest part of the day. A walk on the boardwalk in the shade of the awnings counts.

Wet down, not just dry off. If someone in your group starts feeling overheated, a cool, damp towel on the neck and wrists can do a lot. You don’t need ice — going from very hot to freezing cold too quickly is actually not great for heat exhaustion treatment. Cool and steady is the goal.

Know where you’re going in an emergency. The closest hospital to Seaside Heights is Community Medical Center in Toms River, about 10 minutes inland on Route 37. It has a full emergency department. If someone in your group is showing signs of heat stroke — confusion, slurred speech, loss of consciousness — call 911 first. Don’t try to drive.

Don’t ignore the first signs. I know vacation mode is real. Everyone wants to keep going. But if you or your kids are starting to feel dizzy, headachy, and off — take it seriously. It’s so much easier to recover from heat exhaustion at the rental with cold drinks and a cold shower than it is to spend hours in an emergency room.

What to Pack for a Hot Beach Day

A few things we always bring when it’s going to be a scorcher, set yourself up for success in avoiding both heat exhaustion and heat stroke:

• A large, insulated water jug — keeps drinks cold for hours and gives you a reason to stay hydrated
• Electrolyte packets or sports drinks (plain water is fine, but on really hot days, replacing electrolytes matters)
• A beach umbrella — we can’t bring ours from the rental, but you can rent them on the beach
• SPF 50+ sunscreen, and actually reapply it after swimming
• A small cooling towel or extra washcloths you can wet down
• Lightweight, light-colored cover-ups for the kids during peak sun hours
• Snacks that aren’t salty junk — fruit, especially watermelon, helps with hydration

If your kids are into gear, a good insulated water bottle is the kind of thing they might actually use consistently. Something like this works well for beach days — keeps water cold even when it’s sitting in the sun.

If Someone in Your Group Gets Heat Exhaustion or Heat Stroke

Quick summary for when things are moving fast:

Heat exhaustion — Person is sweating, pale, dizzy, cramping, nauseous, but still alert and making sense:

1. Get them out of the sun immediately
2. Move to shade or air conditioning
3. Lie them down, feet slightly elevated
4. Cool water or electrolyte drink, sipped slowly
5. Cool, damp cloths on neck, wrists, forehead
6. If not improving in 30 minutes: go to the ER

Heat stroke — Person is confused, slurring words, has lost consciousness, or has very high body temperature with hot skin:

1. Call 911
2. Move to shade or air conditioning
3. Remove outer clothing
4. Apply cool water or wet cloths to the skin
5. Do not give fluids if they’re confused or unconscious
6. Stay with them until help arrives

Frequently Asked Questions

What is the difference between heat exhaustion and heat stroke?

Heat exhaustion is a serious condition where the body struggles to cool itself, causing heavy sweating, pale clammy skin, dizziness, nausea, and muscle cramps. The person is still alert and thinking clearly. Heat stroke is a medical emergency — the body’s cooling system has failed, core temperature exceeds 104°F, and the person shows signs of brain dysfunction like confusion, slurred speech, or loss of consciousness. Heat stroke requires calling 911 immediately.

Can you get heat stroke at the beach even with a breeze?

Yes. A sea breeze helps, but it doesn’t prevent heat stroke if you’re spending many hours in direct sun without water or shade breaks. Sand reflects and radiates heat, UV levels are very high in July and August, and people often underestimate how much they’re sweating at the beach.

How long does heat exhaustion last?

The effects of heat exhaustion can last one to two days. If the person isn’t improving within 30 minutes of resting in a cool environment and rehydrating, they should be evaluated in an emergency room.

What should I do if I think my child has heat exhaustion?

Move them immediately to shade or air conditioning, have them lie down, give cool water or a sports drink sipped slowly, and apply cool damp cloths to the neck and wrists. Watch them closely. If they don’t improve quickly — or if they seem confused, start vomiting, or lose consciousness — call 911.

Is it safe to drink alcohol on the beach in the heat?

It’s a personal choice, but alcohol is a genuine risk factor for heat illness. It dehydrates the body and impairs the body’s ability to regulate temperature. If you’re drinking on the beach, offset it with extra water and plan more frequent shade breaks.

A Quick Word on Our Rental

If you’re staying at our place — Unit 18, Shoreside Village, three blocks from the beach — you’re a short walk from the water and just as quick a walk back. The townhouse has central air conditioning throughout, which is exactly what you need if anyone in your group needs to cool down fast. We have plenty of beach towels, and there’s a full kitchen for cold drinks and food. If you’ve got little ones or anyone in the group who’s heat-sensitive, it’s honestly a big advantage to have a real space to retreat to — not just a tent on the beach.

For more on what our rental includes, see the full property listing. And if you’re planning the rest of your beach days, check out our Seaside Heights beach guide and things to do in Seaside Heights for timing tips that’ll help you plan around the hottest parts of the day.

Heat exhaustion and heat stroke are preventable almost every time. Know the signs, drink the water, and give yourself permission to take a break. The beach will still be there at 4pm.