Short answer
Press the back of your hand to the pavement for 7 seconds. If you cannot hold it there comfortably, it is too hot for your dog’s paws. Walk early morning or late evening instead.
In this guide7 sections · 4 min
Dogs do not sweat the way we do. They cool mainly by panting, which becomes far less effective as air temperature climbs — so a dog can be in trouble on a walk that feels merely warm to you.
The 7-second pavement test
Press the back of your hand flat against the pavement and hold it for seven seconds. If you have to lift it, it is too hot for paws. Different charities cite anywhere from five to ten seconds; the exact count matters far less than actually doing it, because the gap between air temperature and ground temperature is much larger than most people assume.
How much larger is genuinely startling. On a 30°C day — warm, not a heatwave — asphalt in direct sun can reach around 57°C. That is hot enough to cause paw pad burns within about a minute of contact.
| Air temperature | Asphalt in full sun (approx.) | Verdict |
|---|---|---|
| 25°C / 77°F | ~52°C / 125°F | Uncomfortable. Grass and shade only. |
| 30°C / 86°F | ~57°C / 135°F | Burns possible within a minute. Do not walk on it. |
| 35°C / 95°F | ~65°C / 149°F | Skin destruction in seconds. Stay in entirely. |
Humidity matters as much as temperature
This is the part that catches people out, because the forecast number looks fine. Panting cools a dog by evaporating moisture from the tongue and airways, and evaporation slows down as the surrounding air gets more saturated.
So a still, humid 24°C afternoon can be more dangerous than a dry, breezy 28°C one, and the dog has no way to tell you the difference in advance. If the air feels heavy to you, cut the walk short regardless of what the thermometer says.
Which dogs overheat fastest
- Flat-faced breeds — pugs, French bulldogs, boxers, shih tzus. Their airways are less efficient at cooling, and they are by far the highest risk group.
- Thick double coats — huskies, malamutes, German shepherds.
- Overweight dogs, senior dogs and puppies.
- Black or dark-coated dogs, which absorb noticeably more heat in sun.
- Dogs with heart or airway conditions, who have far less reserve than their behaviour suggests.
Warning signs to stop immediately
- Heavy, frantic panting that does not slow when you stop
- Bright red or unusually pale gums
- Thick, ropey drool
- Stumbling, disorientation or reluctance to keep walking
- Vomiting
A dog that plants itself and refuses to move on a warm day may well be telling you it has reached its limit. Treat that as a warning rather than stubbornness.
If your dog is overheating, what to actually do
Heatstroke in dogs is a genuine emergency and the first minutes matter more than the drive to the vet. The order below is what matters:
- Stop and get into shade immediately. Do not finish the walk, do not carry on to the car if the car is far.
- Cool with water now. Pour cool — not ice-cold — water over the body, concentrating on the neck, armpits, groin and paws, where blood runs close to the surface. Current veterinary advice favours cooling early and aggressively rather than waiting.
- Move air over the wet coat. A breeze, a fan, a car window. Evaporation is what actually removes heat; wet fur alone does little.
- Offer small amounts of water if they are alert enough to drink. Do not force it.
- Call the vet while you cool, and go. Dogs can deteriorate hours later even after appearing to recover, so a dog that overheated badly needs seeing regardless of how well it seems afterwards.
Burnt paw pads
Separate from heatstroke and easy to miss, because dogs will keep walking on damaged pads. Check after any walk you were not certain about: look for pads that are darker than usual, unusually red, missing patches, or blistered, and for a dog that licks its feet persistently afterwards.
Rinse with cool water and keep the paw clean. Blistering, limping or exposed tissue needs a vet — pad burns become infected easily and are painful out of proportion to how they look.
Practical hot-weather rules
- Walk before 8am or after 7pm in summer. Early morning is safer than evening, because the ground has had all night to cool rather than all day to heat.
- Carry water on any walk over 15 minutes.
- Shorten the walk and add indoor scent games instead — mental work tires dogs without heat load, and a fifteen-minute scent session replaces far more walking than you would expect.
- Never leave a dog in a parked car, even briefly, even with windows cracked.
- Skip the walk entirely on the worst days. One missed walk costs a dog nothing.