Humans can survive (though not comfortably) at temperatures higher than their average body temperature, 98.6 degrees. A cat, however, isn’t likely to survive too long at a temperature higher than the cat average body temperature, about 102.2 degrees. Cats do have sweat glands, but they don’t function exactly like human sweat glands; plus, a cat can’t (or won’t) do all the things humans do to cool down, such as bathe in water or remove clothing.
In fact, it’s very easy for a cat to have a heat stroke, which can be fatal. A sensitive cat owner wants to avoid situations like a parked car with the windows rolled up, any concrete area without shade or any confined area in direct sunlight. Short-nosed cats, including Persians, seem to be the most at risk for heat stroke.