One veterinarian conducted an experiment to show the perils of the summer heat.

By Meghan Overdeep
dog in car window
Credit: MATTHIAS HIEKEL / Staff/Getty Images

As temperatures soar across the country, one North Carolina veterinarian is taking a hands-on approach to dissuading pet parents from leaving their dogs in the car.

To show just how dangerous a hot car can be for canines, Dr. Ernie Ward filmed himself while sitting in a sweltering parked car for 30 minutes. Ward posted the video to his YouTube channel back in 2013, but thanks to the onset of the dog days of summer—pun intended—it's popping up again on social media. We recommend everyone with a four-legged friend watch it.

In the video, Ward spends half an hour in his car with all the windows rolled down an inch on a 95-degree day. Even with the windows cracked, the temperature inside the car manages to reach a dangerous 117 degrees Fahrenheit in just 30 minutes.

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As he sweats profusely, Ward explains that not only can this kind of heat be deadly for dogs (remember, they don't sweat), but it can be traumatic as well.

If you spot a dog trapped in a hot car, The Humane Society recommends taking down the car's make, model and license plate number and informing nearby businesses, in case the owner is inside. If the owner can't be found, call the non-emergency number of the local police or animal control and wait by the car for them to arrive. In Florida and Tennessee, it's legal for good samaritans to break a car window to save a dog in distress as long as law enforcement has been alerted first.