Indoor cats are dying in air-conditioned apartments every summer. | Feline Health Today
Feline Health Today · Summer Safety Series
Read Recommendation
From The Exam Room · Summer 2026

Indoor cats are dying in air-conditioned apartments every summer.

I have been a feline emergency vet for 14 years. I am writing this because I am tired of the same conversation in my exam room.

Dr. Rachel Thompson
Dr. Rachel Thompson, DVM Feline Emergency Specialist · 14 years in practice Verified Veterinary Author

The cat parents who sit across from me are not careless. They are the careful ones. AC running at home. Water in the bowl. Blinds drawn. Cat indoors all day.

They did everything they were told to do. And every summer I am the one who has to tell them why it was not enough.

What I see every July

Every July the same thing happens. A cat comes in lethargic, overheated, breathing too hard. The owner is shaking. She tells me her apartment was at 72 degrees all day.

She does not understand how this could have happened. Almost no one I see in those moments does.

Here is the truth I now tell every cat parent who walks into my clinic. Cats cannot cool themselves the way we do.

Humans have millions of sweat glands. Dogs pant, and you can see it and hear it. Cats have almost nothing to work with.

A cat releases heat from her body through exactly two places. The pads of her paws, and the moisture on her tongue. That is the entire list.

Why the AC is not the answer

In still indoor air, even at 72 degrees, heat builds up inside her body faster than those two pathways can clear it. The AC lowers the temperature of the room. It does nothing about what is happening inside your cat.

This is the part almost no cat parent has ever been told. And it is the reason the careful owners end up in my exam room every summer.

Last July a woman walked in carrying her cat in a beach towel. The cat's core temperature was 105.8.

Her apartment had been at 72 degrees all day. AC running. Water out. Blinds drawn. She sat down across from me and asked the question I have heard hundreds of times.

She asked why no one had ever told her this.

I did not have a good answer for her.

What you are actually watching

The truth is, most cat parents never find out the way she did. Their cat just slows down a little each summer. Spends the afternoon on the bathroom tile. Seems sleepy in the heat.

They figure it is just a cat being a cat. It is not.

That is your cat using her one working cooling system at full capacity. She is pressing her paw pads against the coldest surface in your home because that is the only place her body can actually release heat.

She does this silently. While everything looks completely fine.

What I noticed in the follow-up bloodwork

A few months after that July appointment, I noticed something I had not expected. Some of my patients who had shown early signs of heat stress were coming back with cleaner bloodwork than I would have predicted.

I started asking the owners what they had changed at home.

Several of them mentioned the same fabric mat. I looked into it because the cooling material was familiar to me. It is the same fabric we use in the clinic after surgery to bring a cat's core temperature back down safely.

I had used that material on patients for years. I had not realized you could buy a version of it for the home.

That was when I understood why the bloodwork was improving. These cats finally had somewhere they could release heat the way their bodies actually do it.

Through the paw pads. Onto a surface that pulls heat away continuously and resets itself. The same thing they had been trying to do on the bathroom tile their whole lives, except this time it was actually working.

The Mat I Now Recommend

It is called Firmelle.

No electricity. No gel. Nothing to set up. Your cat will find it on her own because it gives her exactly what she has been searching for every time she lies down on cold tile.

See The Mat
Free Shipping 90-Day Guarantee Heatwave Buy 1 Get 1

I have started recommending it to every owner who comes through my emergency room. And to every owner whose cat shows early signs at a routine checkup, before anything serious happens.

I am not writing this to sell you anything. I am writing this because I have sat across from too many cat parents who did not know.

You have two options from here.

The next heat wave is coming either way.

Option One

Keep doing what you have been doing.

AC running. Water out. Blinds drawn. Hoping the room temperature is enough. Refreshing the thermostat app from your desk on hot afternoons.

!

A short note from me

The real Firmelle mat is only sold at firmelle.shop. There are copies on Amazon and in some stores. The materials are different. They will not work the same way.

Please do not wait until you are sitting across the room from me.

Last summer these sold out before the first real heat week of the year. Please do not wait until it is too late.

Get The Firmelle Mat
Free Shipping Buy 1 Get 1 Free 90-Day Guarantee
From Other Cat Parents

Reviews from owners Dr. Thompson recommended this to

Submitted by real cat parents. Names verified, locations as provided.

★★★★★

My vet was the one who told me about this. She explained the paw pad thing and I sat there feeling like an idiot because suddenly every summer my cat had ever had made sense. The AC at 72 was never the whole answer. I just didn't know that. He found the mat the same day it arrived and has not slept anywhere else in the afternoon since.

Sarah K. Austin, TX Verified Buyer
Vet-recommended
★★★★★

I had two gel mats before this. One cracked open. The other my cat scratched a hole into and I found gel under the couch. I was hesitant to try another cooling mat at all. This one has nothing inside, it is just fabric. I have washed it twice and it works the same as the day it came. She sleeps on it from after lunch until I get home.

Rachel M. Phoenix, AZ Verified Buyer
No gel inside
★★★★★

I work from home so I see exactly what my cat does all day. Before the mat he would rotate between the bathroom tile, the kitchen floor, and the bottom of the bathtub all afternoon. I thought it was cute. After reading what these were actually for, I bought one. He found it within an hour and now he stays on it. The rotation stopped. I had been watching him cool himself for years and not realized that was what he was doing.

Lauren D. Brooklyn, NY Verified Buyer
Finally stopped pacing
★★★★★

I wasn't expecting any dramatic change. What I did notice is she stopped grooming her front legs constantly in the afternoons. She just sleeps now. Her water bowl also looks more normal at the end of the day. Small things, but I've had her for 9 years so I notice when something shifts.

Caitlin P. Portland, OR Verified Buyer
Calmer afternoons
★★★★★

I leave for work at 7 and my apartment hits the low 80s by lunchtime even with the AC on. Every summer I dreaded leaving the house. I would check the thermostat app on my phone all day. Since the mat came I check it maybe once. He picked his spot the first day. I get my afternoons back at work. That alone was worth it.

Jen S. Sacramento, CA Verified Buyer
Stopped checking from work
Firmelle Cooling Mat
Buy 1 Get 1 · Heatwave Sale
Get Yours