Leaving your dog in your car in the summer is not the best idea. If you absolutely have to do it, you can use the PuppComm to monitor your dog’s condition at all times. It is a palm-sized cloud-connected device that combines with an app to help you quickly check up on your pet. It sends you alerts before dangerous conditions are reached.
The kit also comes with stickers you can use to show passersby how your dog is doing. The PuppComm comes with a temperature/humidity sensor, microphone, GPS, WiFi, and cellular connectivity. You get heat index and barking alerts on your handheld devices.[where to find it]