Pets are not able to sweat like people so extra precautions need to be taken. Leaving your windows open a little can help, but on those really hot days the temperature in the car can soar so rapidly that your dog or cat can have a severe heat stroke which can be fatal. Bring along some iced bottled water so a cool drink can help regulate body temperature - also a good idea for those long walks . Annoying insects, like mosquitoes and wasps, can be bothersome to people and pets. There are insect repellants available such as Tomlyn's Daily protection, which is also good for fleas and ticks, and Mela Conditioning Spray, a natural repellant.
Some shampoos offer a insect repelling ingredients, citronella, cedar, pennyroyal and comfrey.
If your pet does manage to get a few bites, there are some remedies that will sooth the pain and itching, again in a shampoo or spray form, most of them containing tea tree oil, like Groomer's Edge OatMella Shampoo, combining oatmeal and mellaleuca. All pets require shade outside. An easy way to provide shade for them is to have a Dogloo Pet Home handy. These nitrogen insulated houses are cooler in summer and warmer in winter, easy to move around the yard, easy to clean, and there are no tempting crevices for insects to set up camp. Be extra careful if you have those breeds of animals that are more prone to heat stroke than others.