The Heat Dome Is Back
Updated: Sep 2
Here's How to Keep Your Dog From
Becoming a Cautionary Tale
Ohio is doing its impression of a convection oven again, and while the humans are just trying to survive the walk from the car to the office, your dog is out there wearing a fur coat with no off switch. He didn't pack for this. He doesn't know it's 91 degrees. All he knows is that you opened the door and the yard is still technically outside, and outside is where the good smells are.
So let's talk about heat stroke: what it actually is, how it's different from heat exhaustion, why dogs are so much worse equipped for this than we are, how to catch trouble early, what to do if it happens anyway, and how to keep your dog engaged this summer — indoors and out — without turning things into an emergency.
Why dogs overheat so much faster than we do
Pike and Gus have strong feelings about summer, and those feelings can be summed up as "the couch may be cooler than the yard but, baby, we were born to run" and "why are walks happening at hours normally reserved for raccoons?" It's up to me to be the overprotective helicopter parent, and it's worth explaining why.
It helps to understand just how badly dogs got shortchanged on this particular piece of biology. Humans are covered in sweat glands, millions of them, quietly doing their job across nearly our entire body every time we get too warm. Dogs have a handful tucked into their paw pads and basically nowhere else. Their main defense is panting, where air is cycled across their wet tongue to shed heat the way an old swamp cooler works. And while it's a genuinely clever system, there's a hard ceiling on how much heat it can move.
Add in the fact that dogs are, structurally speaking, wearing a coat they can't take off, often a dark or dense one that absorbs sun rather than reflecting it, and you start to see the math working against them. A dog running around at your side on a 90-degree day isn't just "also hot." He's working with a far less efficient cooling system, less surface area exposed to air, and no ability to strip down when things get uncomfortable. That gap is exactly why a walk that barely makes you break a sweat can be genuinely dangerous for him.
Heat exhaustion vs. heat stroke: knowing the difference
These two terms get used interchangeably a lot, and that's honestly part of the problem, because they're not the same thing, and knowing where your dog sits on that spectrum changes what you should do next.
Heat exhaustion is the earlier, more reversible stage. It's your dog's body straining against the heat but still managing, mostly, to keep up. You'll see heavy panting, tiredness, maybe some drooling and a dog who wants to lie down and isn't interested in continuing the walk. It's uncomfortable and it's a real signal to stop immediately and cool him down, but at this stage, getting him into shade, offering water, and letting him rest is often enough to turn things around.
Heat stroke is what happens if that window gets missed and his body temperature keeps climbing, generally north of 103 degrees and rising. This isn't discomfort anymore, it's organ systems starting to struggle, blood losing its ability to clot properly, and a body that's tipped from "straining" into "failing."
The signs escalate accordingly: wobbliness or collapse, vomiting, gums turning bright red or purple, a racing heart, disorientation, and in severe cases, seizures. Heat stroke doesn't reliably reverse itself with rest and water. It needs veterinary care, and it needs it fast.
Think of heat exhaustion as the warning shot and heat stroke as the emergency itself. The faster you catch the first one, the better your odds of never having to deal with the second.
Learning to read the warning signs
The good news, if there's good news in an article about medical emergencies, is that heat stroke rarely comes out of nowhere. It builds through that heat exhaustion stage first, and if you know what to watch for, you've got a real window to act before things turn dire.
Heavy panting that won't let up is usually the first flag, especially if it doesn't ease once he's back in the shade or indoors. From there, watch for gums and tongue turning an alarming bright red or purple, drool that's gone thick and ropey instead of its usual drippy self, or a wobble in his walk that wasn't there ten minutes ago.
Vomiting, a racing heartbeat, and a glazed or unfocused look in his eyes are all signs things have moved past "uncomfortable" into "urgent." Seizures show up in the worst cases, and if you're seeing one, you're already well past the point of waiting to see how he does.
The short version: if your dog goes from panting a lot to not quite tracking you with his eyes, don't wait around to see what happens next.
What to actually do
Here's the mindset shift that matters most: heat stroke is a "start cooling him down on the way to the vet" situation, not a "let's give it twenty minutes and see" situation. Even if he seems to bounce back once you get him somewhere cool, get him checked anyway. The damage heat can do inside a dog's body doesn't always announce itself right away, and a dog who looks fine in your kitchen can still be dealing with real internal fallout.
While you're getting him there, move him out of the heat immediately, shade, air conditioning, wherever the sun isn't actively working against you. Start cooling him with room-temperature or cool water rather than anything ice-cold, since ice-cold water can actually cause blood vessels to clamp down and trap heat inside rather than releasing it, which is the opposite of what you're going for. Wet towels across the neck, armpits, and groin work well for this.
Get some airflow going, a fan, the car's AC, whatever you've got, and if he's alert enough to want water, let him have small amounts rather than pushing a full bowl on him.
And call your vet the moment this starts, not after you've already tried a few things at home.
Keeping it from happening in the first place
Prevention, thankfully, is the easy part, and most of it comes down to habits rather than heroics.
The parked car rule isn't negotiable, not for a minute, not with the windows cracked. Car interiors climb to dangerous temperatures faster than most people realize, even on days that don't feel especially brutal from the driver's seat.
Shift your walks to the cooler edges of the day, early morning or after the sun's lost its grip in the evening, and use the back-of-the-hand test on pavement before you head out; if it's too hot for you to hold your hand against for five seconds, it's too hot for paws.
Keep water available everywhere, at home and on outings both, and get to know your own dog's particular risk factors, since a flat-faced senior in a heavy coat needs a lot more caution than a lean young dog with a short coat and a normal snout.
Give him somewhere to retreat to, shade, air conditioning, a cool tile floor, dogs are pretty good at self-regulating if you just give them the option. And don't just watch the thermometer; watch the humidity too, since thick, soupy air makes panting far less effective, and an "only" 85-degree day with heavy humidity can end up more dangerous than a drier 90-degree one.
You don't have to bench him for the season
None of this means summer has to be a written-off season of couch time. It just means the rules shift a little when a heat dome rolls in.
Stick to early morning or evening for anything active, and think about what you'd want for yourself if you had to move around in this heat; if a 2 p.m. run sounds miserable to you, it's not any better for him. A brisk twenty-minute walk beats a brutal forty-five-minute one every time, so trim things down rather than pushing through.
Grass and dirt stay noticeably cooler underfoot than asphalt or concrete, so a shaded park path is going to treat his paws a lot better than a sunbaked sidewalk.
Bring water for both of you and take real breaks in the shade rather than pushing straight through to the end of the route.
If you've got access to a dog-safe pond, lake, or even a kiddie pool, swimming is a great alternative, it burns energy without cranking up his body heat the way running does.
Mostly, though, watch him instead of the clock. Heavy panting, a dog who's slowing down, or one who keeps angling toward shade is telling you it's time to head in, no matter how far into the walk you are.
And on the genuinely brutal days, just skip the intense stuff altogether. Fetch and hard runs can wait for October. A slow, sniffy walk still counts, and it's a whole lot safer.
Keeping him busy when outside just isn't happening
Some days, the heat wins, and the right call is just staying in. That doesn't have to mean a bored dog staring mournfully at the front door. Mental exercise tires a dog out in a way that's genuinely comparable to physical exercise, and a good chunk of it can happen without either of you breaking a sweat.
Puzzle feeders and snuffle mats turn mealtime into a project instead of a thirty-second event, and a frozen food-stuffed toy can occupy a dog happily for a solid stretch while also, conveniently, being cold. A round of hide-and-seek with treats scattered around a room, or a refresher on basic obedience cues, taps into the same problem-solving part of his brain that a long walk would, just without the heatstroke risk.
Scent work is another good one, hiding a treat or a favorite toy and letting him track it down uses an enormous amount of mental energy for very little physical effort. And if he's food-motivated the way most dogs are, a slow-feeder or a lick mat with something like plain yogurt or peanut butter can turn into a genuinely calming activity, the kind that leaves a dog pleasantly worn out rather than wound up.
Even short indoor training sessions count for more than people expect. Ten minutes of practicing "stay" or working on a new trick asks more of a dog's brain than most people realize, and a dog who's mentally tired often settles down just as thoroughly as one who's been on a long walk. It's not a replacement for regular exercise long-term, but on a heat dome day, it's a legitimately good substitute, and it buys everyone some peace until the temperature breaks.
Stay cool out there, and keep an eye on the ones who can't tell you when they're in trouble.
As always, this post is for informational purposes and is not a substitute for veterinary care. If you have concerns about your dog's health, contact your veterinarian.
Great article, Kim!