7 Key Signs of Heatstroke in Cats — and What to Do

Summer’s here, and while you’re lounging with a cool drink, your cat is probably sprawled out in the sun, looking adorable… until they start feeling too hot. Heatstroke can sneak up on them faster than a feather toy chase, and you need to be prepared.

Cats don’t sweat like us, so when it’s hot, they rely on other signs to tell you they’re struggling. Knowing what to look for could be the difference between a minor issue and a serious emergency. Here’s what you need to know.

Panting or Open-Mouthed Breathing

If your cat starts panting like a dog, it’s a red flag. Cats only pant when they’re overheated or stressed, so if they’re breathing with their mouth open, they’re likely suffering from heatstroke and need immediate attention.

Excessive Drooling

Cats drool, but heatstroke turns it into a flood. If your cat’s drooling more than usual, especially with no food in sight, it could be a sign they’re struggling to regulate their body temperature. Wipe them down and get them cooled off.

Lethargy or Weakness

When a cat starts feeling lethargic or weak, they’re telling you something’s wrong. Heatstroke makes them tired and listless—so if your cat is barely moving or seems disoriented, get them to a cooler spot and hydrate them ASAP.

Elevated Heart Rate

Your cat’s heart rate can skyrocket when they’re overheated. If you’re unsure, gently feel for their pulse. A racing heartbeat, along with signs of distress, is a strong indication that heatstroke is in play. Time to cool them down!

Vomiting or Diarrhea

Heatstroke can upset your cat’s digestive system. If you notice them vomiting or having diarrhea, it’s more than just a food problem—it could be their body’s reaction to extreme heat. Keep them hydrated and cool, and call the vet.

Uncoordinated Movements

A cat in the throes of heatstroke may start stumbling or showing signs of disorientation. If they’re wobbly on their feet or can’t seem to walk straight, it’s a serious sign that their body is overheating and needs immediate intervention.

Changes in Gum Color

Check your cat’s gums—pale, blue, or bright red gums are abnormal and indicate heatstroke. Healthy gums should be pink, so if they’re not, it’s time to get them cooled off and to the vet quickly.

Cool Them Down, Fast

If your cat shows signs of heatstroke, get them to a cooler area immediately. Use cool (not cold) water to gently wet their fur, offer water to drink, and let them rest in a shaded area. If symptoms don’t improve or worsen, take them to the vet—fast.

Keep It Cool, Keep It Safe

Heatstroke is no joke, and the best way to avoid it is prevention. Keep your cat’s environment cool, provide plenty of fresh water, and avoid long periods in direct sunlight. If you spot any signs of heatstroke, act quickly—you’ve got this!