Summer brings longer walks, outdoor adventures and more time spent enjoying the sunshine with our pets. But rising temperatures can also increase the risk of dehydration and heat-related illness for dogs, cats and other companion animals. Staying hydrated is one of the simplest and most important ways pet owners can support their animals’ health and well-being during warm weather.
Pets depend on us to recognize when they may be overheating or dehydrated. By understanding the signs and taking a few proactive steps, pet owners can help animals stay safe and comfortable throughout the season.
Why hydration matters for pets
Water supports nearly every essential function in a pet’s body, including digestion, circulation, joint health and temperature regulation. During hot weather, pets naturally lose more fluids through panting and activity, making hydration especially important.
Unlike humans, most companion animals cannot cool themselves efficiently through sweating. Dogs primarily regulate body temperature by panting, while cats rely on grooming and limited sweating through their paw pads. During periods of extreme heat or humidity, these cooling systems may struggle to keep up.
Some pets may face a higher risk of dehydration, including senior animals, puppies and kittens, flat-faced breeds and pets with chronic medical conditions. Highly active pets and animals spending extended time outdoors may also need to drink more during the summer months.
Signs of dehydration in pets
Dehydration can develop quickly, particularly during periods of high heat or exercise. Some symptoms may appear mild at first but can worsen without treatment.
Common signs of dehydration include dry gums or nose, excessive panting, lethargy, loss of appetite, sunken eyes and reduced skin elasticity. Pets may also appear weak or less interested in activity than usual.
The American Kennel Club notes that severe dehydration may also lead to vomiting, collapse and other medical emergencies that require immediate veterinary attention.
One simple way to check hydration at home is to gently lift the skin between your pet’s shoulders (tenting) and release it. In a well-hydrated pet, the skin should quickly return to its normal position. Slow movement or skin that remains tented may indicate dehydration.
If a pet becomes disoriented, collapses or struggles to breathe, seek veterinary care immediately.
Helping pets stay hydrated during hot weather
Fresh, cool water should always be available, especially after outdoor walks or playtime — washing bowls regularly can also encourage pets to drink more throughout the day. Cats tend to be more picky about the quality of water they drink, so make sure their bowls or water fountains are clean.
When traveling or spending time outside, bringing portable water bowls or pet-safe travel bottles makes hydration easier to manage. Some pets, especially cats, may benefit from additional moisture in their diets — wet food or water-rich treats like cucumbers or seedless watermelon, offered in moderation, are good options.
Creating shaded resting spaces indoors and outdoors can further help pets regulate body temperature. Fans, cooling mats and air-conditioned environments may reduce the risk of overheating during extreme heat.
Pet owners should also avoid exercising pets during the hottest part of the day. Early morning or evening walks are often safer and more comfortable during summer.
What to do if a pet overheats
Heat-related illness can escalate quickly. If you suspect your pet may be overheating, move them to a shaded area immediately and offer small amounts of water. Offering too much water, too fast can actually make pets sick, so make sure to help them pace their water intake.
Applying damp towels to the paws, belly and body may help lower body temperature gradually.
Avoid using ice-cold water, which can cause shock. Contact a veterinarian right away if symptoms persist or worsen.
The American Veterinary Medical Association warns that temperatures inside parked vehicles can rise rapidly, even on relatively mild days, putting pets at serious risk for heatstroke within minutes. Pets should never be left unattended in vehicles during warm weather.
Frequently asked questions about pet hydration
Water needs vary based on size, age, diet and activity level. In general, many dogs need about one ounce of water per pound of body weight daily, though pets may require more during hot weather or periods of increased activity.
Yes. Senior pets, young animals, flat-faced breeds and pets with medical conditions may face a higher risk of dehydration and overheating in hot weather.
Wet food may help increase moisture intake, particularly for cats who naturally tend to drink less water than dogs.
As a general guideline, pet owners should use caution when temperatures exceed 85°F, particularly when humidity is high. Hot pavement can also burn paw pads quickly — if the asphalt feels too hot to hold your hand against for a few seconds, it’s too hot for your pet. Avoid outdoor activity during peak afternoon temperatures and watch for signs of overheating.
If a pet suddenly refuses water or shows signs of illness, contact a veterinarian. Reduced water intake may signal dehydration or an underlying medical issue.
Supporting pets through every season
At American Humane Society, we believe everyday acts of care help strengthen the bond between animals and the people who love them. Simple steps — like keeping fresh water available and limiting outdoor activity during peak heat — go a long way toward keeping pets safe and comfortable all summer long.
