 If you take these proper precautions, your cat should be able to stay cool, comfortable and safe on even the hottest day. Here are some preventative steps to take. Number one, supply your cat with plenty of cool water. You can keep it cool by actually most likely purchasing a Yeti dog bowl, buy the small one and fill it up and it'll keep that water cool throughout the day. Number two, try giving your cat wet food to give them a little hydration on hot days.