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Hot pavement and your dog's paws

The ground gets far hotter than the air, and stays hot after sunset. What has been measured, the hand check that catches it, and what to do if a pad is burnt.

By Derek Ang, founder of PawPrint · Updated

Quick answer

The ground is a different question from the air, and it is the question most walk decisions get wrong. Surfaces in direct sun run far hotter than the air above them, and asphalt keeps releasing that heat for hours after sunset. The check that actually works needs no equipment and almost no time: press the back of your hand flat on the surface you are about to walk on. If you cannot hold it there comfortably, neither can your dog — and unlike you, your dog has no choice about where to put its feet.

What has actually been measured

Asphalt has been measured at around 52°C when the air is only 25°C. That figure comes from a Phoenix field measurement published in JAMA in 1970, as reported by Washington State University's veterinary hospital, and it is hot enough to burn paw pads.

The gap between air and surface is the whole point. A pleasant afternoon and a dangerous pavement are the same afternoon. Dark surfaces absorb more; asphalt absorbs more than concrete; both absorb more than grass or packed earth. Shade changes it dramatically — the same stretch of road can be fine on one side and not on the other.

On how quickly it matters: in a study of street surfaces in Phoenix in summer, Harrington and colleagues in the Annals of Emergency Medicine found asphalt hot enough to cause a second-degree burn within about 35 seconds of contact. That is a measurement of street surfaces in one hot American city in one summer, not a description of the road outside your door — but it establishes the timescale. This is not an injury that needs a long walk to happen.

The hand check

Press the back of your hand on the pavement for 7 seconds, the convention described by Washington State University.

Three things make the difference between a check that works and a ritual that does not:

Test the surface you will actually use. The shaded step outside your door is not the road, the car park, or the bridge with no cover. If your route changes surface, test again.

Use the back of your hand, not your palm. Palms are tougher and less sensitive than the skin on the back of the hand, which is closer to what a pad will register.

Do it in the sun. A surface in shade and the same surface twenty metres along in full sun are not the same surface.

It is a practical warning check, not a certificate that the whole walk is fine. It tells you about the ground. It tells you nothing about humidity, exertion, your dog's breed or age, or the hill halfway round.

Why evening walks still need the check

This is the part that surprises people. Air temperature drops quickly after sunset; road temperature does not. Asphalt has absorbed heat all day and releases it slowly, so the road can remain hot long after the air has become comfortable — and the mismatch is worse on a clear, still evening than a breezy one.

So the evening walk is genuinely the best fix available for hot weather, and it is not a reason to skip the check. Same check, same back of the hand.

Choosing a different surface

Most of the time the answer is not "don't walk", it is "walk somewhere else".

Grass, packed earth and woodland trails run far cooler than road or paving. A shaded pavement is cooler than an open one. Walking on the shaded side of a street, crossing to keep shade, and cutting out open car parks and bridges will often turn an impossible route into an easy one — and none of that requires giving up the walk.

If there is genuinely no cool surface between your door and anywhere worth going, that is a real constraint, and the honest answer is to wait for the evening or keep it to a few minutes of toilet break rather than a walk.

If you think a pad is burnt

Look for limping, refusing to continue, licking or chewing at the feet, pads that look darker or redder than usual, missing patches of pad surface, or blistering. Damage can show up hours later, so a dog that walked home happily is not evidence that the pads are fine.

Get the feet onto something cool — cool water, a cool floor — and keep the dog off hot surfaces entirely. Do not apply human burn creams, do not pop blisters, and do not bandage tightly. Pad burns can become infected and some need veterinary treatment, so if there is visible damage rather than mild tenderness, call a vet.

What a weather forecast can and cannot tell you

A forecast can tell you the air temperature, roughly how sunny it will be, and when it will cool down. Those are genuinely useful inputs, and they are enough to rule out the obvious cases in both directions.

What no forecast knows is the surface. It does not know that your street is dark asphalt and your neighbour's is pale paving, that the park is four hundred metres of open tarmac away, or that the bridge on your usual loop has no shade at any hour. Treat any tool — PawPrint included — as narrowing the question rather than answering it, and keep the last step in your own hand. Literally.

Sources

Common questions

How hot is too hot for a dog's paws on concrete?

There is no single air temperature that answers it, because the surface — not the air — is what burns. Asphalt in direct sun runs far hotter than the air above it, concrete less so, and grass less again. Test the actual surface with the back of your hand rather than reading the forecast.

Is it safe once the sun has gone down?

Usually safer, but not automatically safe. Asphalt stores heat and releases it slowly, so a road can still be uncomfortably hot an hour or more after sunset while the air feels pleasant. The hand check works after dark too, and takes the same few seconds.

Do dog boots solve this?

They can, for dogs that tolerate them and when they fit properly. They are not a licence to walk in conditions that are otherwise unsafe, though: boots protect the pads and do nothing about the heat load on the rest of the dog.

What does a burnt paw pad look like?

Limping or refusing to walk, licking or chewing at the feet, pads that look darker than usual or unusually red, missing patches of pad surface, or visible blisters. Burns can appear hours after the walk, so a dog that seemed fine is not proof that nothing happened.

How this page was made

Prepared for PawPrint with AI assistance. Updated . Editorial review by Derek Ang has not yet been recorded. Sources are linked so you can check the guidance and its limits. This guide is general information; it does not replace advice from your vet or the relevant authority.