The weather this spring and summer has been
extremely hot and humid this year, while little rain has fallen. During these
“
dog days”, pets are at high risk for
hyperthermia and dehydration. Humans have the ability to sweat and the
knowledge that it’s time for a nice glass of Gatorade to replace body salts
lost through sweat. While cats do sweat through their feet, the surface of the
paw pads do not provide enough cooling to lower the internal temperature. Cats
DO pant, but only once the temperature reaches about 90 degrees, and it is not
as efficient as it is in dogs. Cats will also groom more in hot weather,
moistening their coats in an attempt to cool down, but again, that thick coat
of fur is doing no favors. Cats that roam outdoors may not have easy access to
water.
A cat’s normal body temperature is 99.5 to
102.5 degrees at the core and can be slightly higher or lower at the
extremities (ears, tail and legs). Heatstroke is an illness that develops when
the cat’s body temperature reaches 104 to 106 degrees Fahrenheit due to
environmental heat (this is different than a fever which is a result of changes
within the body). If the cat’s body temperature rises above 106 degrees, the
heat stroke is considered severe and requires immediate veterinary care. If
your cat is suffering from heat stroke, it is important to lower its body
temperature or death can occur.
How will you know if your cat is experiencing
heat stroke?
Signs of Feline Hyperthermia (Heatstroke)
- Panting
- Lethargy (sleepiness or
unwillingness to move)
- Rapid heart rate
- Dark, red colored gums
- Thick, sticky saliva
- Anxiety
- Dizziness
- Weakness
- Vomiting and/or diarrhea
- Depression
- Shock
- Nose bleed
- Muscle tremors
- Coma
In addition to watching for symptoms, you may wish to check your cat’s body
temperature with a rectal thermometer. A temperature above 102.5 degrees
Fahrenheit requires immediate attention.
How to Treat Heatstroke in Cats
If you think that your cat may be suffering from heat stroke, please
contact your veterinarian, immediately! Hyperthermia can quickly become a life
or death situation, so a qualified doctor should be involved.
If you think your cat may be suffering from hyperthermia, remove it from the
heat immediately. Pour lukewarm water over the cat, making sure the undercoat
becomes wet, not just the surface of the hair. Once the hair is thoroughly wet,
place the cat near a fan to increase air circulation. An automobile air
conditioner can cool the cat too quickly,
so be cautious on the way to the veterinary office. If the body cools
too quickly, the cat can easily become hypothermic (too cold) and other medical
issues can arise.
The rectal temperature should be checked every 5 minutes to ensure that the
temperature is not dropping too quickly or too low. As soon as the body
temperature reaches 103ºF, the cooling measures should be stopped and the cat
should be thoroughly dried and covered so he does not continue to cool. Even if
the cat appears to be recovering, he may still be dehydrated or have other
internal complications, so take him to your veterinarian as soon as
possible.
At the veterinary hospital, your cat will be monitored for complications of
heat stroke such as respiratory distress, heart abnormalities, organ failure,
shock and other complications, and treated accordingly. If his temperature has
not yet become normal, your veterinarian will take steps to return the
temperature to normal. Depending on your veterinarian’s assessment, your cat
may receive IV fluid therapy, oxygen therapy, or other treatments to address
the complications of this illness, such as clotting disorders.
Cats who have suffered from mild hyperthermia may return to normal health
within a few hours. Severe cases of hyperthermia may result in long-term health
issues, such as kidney disease, and may require lifelong treatment. A cat that
has suffered heat stroke once in their lives may be at higher risk for repeat
episodes in the future.
Prevention of Hyperthermia in Cats
Fortunately, heat stroke is fairly easy to prevent. While we often see
warnings about leaving dogs in parked cars in the summer,
we rarely see similar warnings about cats – mostly because cats don’t tend to
travel with their families as frequently as dogs do. However, cats are just as
at-risk for hyperthermia when left alone in a vehicle as dogs, since cars can
quickly become ovens (up to 140 degrees!) even on a “quick trip” to the store.
If your cat is regularly allowed outdoors, even if he comes inside at night,
please make sure that you provide a shady shelter from the sun, such as a cat
house. Your cat may not appreciate it, but you should limit outdoor time on the
hottest days, and keep your cat inside during 11 a.m. and 3 p.m., which is when
the sun is at its highest peak and temperatures tend to be warmer. Fresh water
should also be provided on a daily, if not twice daily, basis. Even if your cat
is an indoor cat, be sure to leave him plenty of fresh water daily. Placing a
few ice cubes in the water will help keep it refreshing.
There is no set temperature that is “too hot” for your cat, but be aware
that older cats with pre-existing medical conditions such as heart disease,
obesity, asthma or other respiratory conditions place them at higher risk for
heat stroke will have a lower tolerance
for heat than young, healthy cats.
If
you do not have air conditioning in your house, be sure that your cats have
access to cooler areas in your home such as your basement, or rooms with
ceiling or other fans.
Read about more ways to
keep your cats cool!