Check if your cat feels unusually warm, especially the ears, paws, or nose
Look for lethargy or low energy
Notice if your cat is eating less than usual
Watch for hiding or unusual withdrawal
Observe rapid breathing or panting
Check for shivering or trembling
Look for dehydration, such as dry gums or reduced skin elasticity
Notice if your cat is less responsive or seems weak
Take your cat’s rectal temperature with a pet thermometer
Seek veterinary care if the temperature is 103.5°F (39.7°C) or higher
Seek urgent veterinary care if the temperature is 104°F (40°C) or higher