Some dogs are my prone and sensitive to overheating than others. You need to be extra vigilant with dogs who have short noses, short hair and dark colored coats. What you need to watch out for to see if your dog is overheating and how to reduce their temperature if it is! Remember prevention is key; there are a number of ways to keep your dog cool on a hot day. Heat stroke in dogs can cause major illnesses such as kidney damage, brain swelling and it really bad conditions it can result in death.