Cats have a reputation for being low-maintenance, self-sufficient creatures. In many ways, they are. But that independence comes with a catch: cats are remarkably good at hiding discomfort, and heat is no exception.
By the time a cat is visibly struggling in warm weather, they’ve often been uncomfortable for a while. Knowing what to look for before things escalate is one of the most useful things you can do as a cat owner during a Maryland summer.
Here’s what to watch for, as well as what to do when you see it.
1. Panting
Cats are not dogs. Unlike their canine counterparts, healthy cats almost never pant under normal circumstances. If your cat is breathing with their mouth open, moving their sides rapidly, or making audible respiratory effort, that is a warning sign.
Panting in cats indicates the body is struggling to regulate its temperature and warrants immediate action: move your cat to a cool, shaded area, offer fresh water, and contact your vet. Do not wait to see if it resolves on its own.
What to do: Get your cat into a cool room right away. Place a damp (not cold) towel on their paws and belly, and offer water. Call Catonsville Cat Clinic if panting continues for more than a few minutes.
2. Excessive Grooming or Wet Fur
You may notice your cat licking their coat more than usual on a hot day, particularly their legs and paws. This is actually a deliberate cooling strategy.
As saliva evaporates from the fur, it creates a modest cooling effect, similar in principle to sweating. While occasional extra grooming in heat is normal self-regulation, compulsive or frantic licking, or fur that stays noticeably damp, can signal your cat is working overtime to stay cool and needs help.
What to do: Provide a cooler environment. A damp cloth gently stroked along the fur — especially around the neck, armpits, and belly — can help. Make sure your cat has access to fresh, cool water at all times.
3. Lethargy and Unusual Stillness
A cat lounging in the summer heat looks a lot like a cat on any other day, which is part of what makes heat-related lethargy easy to miss. The distinction to look for is degree and context.
A cat who is unusually unresponsive, difficult to rouse, or disinterested in things that normally engage them (food, their favorite toy, you walking through the door) may be more than just relaxed. Heat exhaustion dampens alertness and energy in ways that go beyond normal napping.
What to do: Gently coax your cat to a cooler spot. Offer water. If they remain unresponsive or limp, treat it as an emergency and contact us immediately.
4. Drooling
Drooling is uncommon in cats outside of very specific contexts. Some cats drool when they’re deeply content and kneading, for instance. But drooling that appears in a hot environment, particularly alongside other symptoms like panting or lethargy, is a red flag for heat exhaustion or early heatstroke. It indicates the body’s normal systems are being pushed past their comfortable range.
What to do: Move your cat to a cool area immediately. Offer small amounts of cool (not ice cold) water. This symptom in combination with others warrants a call to the vet without delay.
5. Rapid Heartbeat
This one requires you to get hands-on, but it’s worth knowing. A cat’s normal resting heart rate is between 140 and 220 beats per minute — already quite fast compared to a human’s. In heat distress, the heart races even faster as the body tries to circulate blood and manage temperature.
You can feel your cat’s heartbeat by placing your hand gently on their left side, just behind the front leg. If the pulse feels unusually rapid or irregular, combined with any other symptoms on this list, take it seriously.
What to do: This level of cardiovascular stress means your cat needs to be seen. Cool them gently while you call us or head to the nearest veterinary clinic.
6. Vomiting or Loss of Appetite
Heat affects the digestive system too. A cat experiencing heat stress may vomit, refuse food, or show sudden disinterest in water. Because cats don’t have a strong drive to drink proactively, even mild heat-related nausea can quickly tip into dehydration, which then compounds the heat problem. A cat who skips a meal on a hot day may simply be self-regulating, but vomiting or complete food and water refusal deserves closer attention.
What to do: Do not force food. Offer fresh, cool water in multiple locations. If vomiting occurs more than once or your cat refuses water entirely for several hours, contact Catonsville Cat Clinic.
7. Seeking Unusual Hiding Spots
Cats instinctively seek cool, dark, low places when they’re overheated, including under the bed, behind the toilet, or in a closet corner. A cat who suddenly disappears into an unusual hiding spot on a hot day isn’t just being antisocial. They’re telling you something. While some hiding is completely normal cat behavior, a sudden change in pattern during warm weather, especially combined with any of the above signs, is worth investigating.
What to do: Check on your cat, gently. If they’re unresponsive, feel unusually warm to the touch, or show any other symptoms, move them carefully to a cooler area and call your vet.
The Cats Most at Risk
While any cat can overheat, some are more vulnerable than others. Keep a closer eye on:
- Flat-faced breeds (Persians, Himalayans, Exotic Shorthairs) — their shortened airways make breathing less efficient, which limits their ability to cool down
- Senior cats — thermoregulation becomes less effective with age
- Overweight cats — extra body mass generates more heat and makes it harder to dissipate
- Cats with heart or respiratory conditions — already working harder under normal conditions
- Kittens — less physiologically equipped to handle temperature extremes
Prevention Is the Best Medicine
The good news: heat-related illness in cats is largely preventable. Keep at least one room in your home consistently cool, provide fresh water in multiple spots (a pet fountain can help encourage drinking), keep your cat away from sunlit cars and enclosed spaces, and schedule a summer wellness exam so we can flag any underlying conditions that might increase your cat’s risk.
If you’re ever unsure whether what you’re seeing is heat-related or something else, don’t guess. Call us. That’s what we’re here for.
Schedule a wellness exam at Catonsville Cat Clinic and head into summer with confidence.