Cats are not desert animals in your apartment. And if yours is panting, it is an emergency.

They believe the desert-cat thing. I did too, for a long time.

Yes, cats descended from a small wild cat in North Africa. Yes, the ancestors handled dry heat. But those cats survived because of the ground under them. They dug into cool earth. They found cold stone in the shade. They moved constantly to fresh spots.

Your apartment cat cannot do any of that.

Her carpet holds heat. Her couch holds heat. Her cat tree holds heat. The only thing in most homes that does anything close to what desert stone does is the bathroom tile. And the tile is small.

That is why she lies on it every summer afternoon. She is not being weird. She is doing math.

What almost no cat parent has been told

Cats have almost no way to release heat from their bodies. Two small clusters of sweat glands on the pads of their paws. A little moisture on their tongue. That is the entire cooling system.

In still indoor air, even at 72 degrees, heat builds up inside her faster than those two pathways can clear it. The AC lowers the temperature of the room. It does not lower the temperature of your cat.

The signs before the panting

Now here is the part that matters most.

Long before a cat starts panting, she starts acting a little off. These are the early signs almost every cat parent I know has watched happen and dismissed.

Every one of these signs shows up before the panting does. They are the warning your cat gives you when her body is starting to struggle.

Almost no cat parent notices them in time.

Panting is an emergency

Panting is what comes after those signs are ignored.

A dog pants routinely to cool down. A cat almost never does. If you ever see your cat with her mouth open, her tongue slightly out, her chest visibly rising and falling faster than normal, that is not a warm cat. That is a cat whose body has run out of ways to release the heat trapped inside her.

The next sign after that is her gums. If they look bright red instead of the healthy pale pink, her blood vessels are dilating to try to cool her from the inside. That is the second-to-last stage before things get very bad.

If you see panting or red gums, do not wait. Take her to the vet immediately.

Why the tile only works for a while

I learned all of this the hard way from a vet I trust. She told me last summer that most of the heatstroke cats she sees come from homes with the AC running. The owners had done everything they were told to do. AC on. Water bowl full. Blinds drawn. It was not enough because the AC was cooling the room, not the cat.

She also told me why the bathroom tile only works for a while.

The tile pulls heat from the cat's paw pads. That is the right cooling pathway. But the tile has nowhere to send the heat. It absorbs the heat and holds onto it. Within about 15 minutes, the section of tile under her body warms up, and she has to move to a fresh spot.

That is why she rotates all afternoon.

The vet said what most cat parents need is a surface that does the opposite of tile. A surface that does not saturate.

She recommended a fabric mat called Firmelle. She had started noticing cleaner follow-up bloodwork on the cats whose owners had bought one.

Here is how it works.

The cat lies on the mat. Heat flows from her paw pads and belly into the top of the mat. But instead of holding onto the heat, the mat channels it down through the fabric and releases it out the underside into the air below. Continuously.

That release is the whole difference. The tile absorbs and holds. The mat absorbs and releases.

The surface she lies on stays cool for hours instead of minutes, because her body heat has somewhere to keep going.

I now recommend it to every cat parent in my community.