If you think that singing in front of Simon Cowell is scary, you’d better not let him catch you leaving your dog in a parked car this summer, or you’re liable to get more than razor-sharp remarks from him. This tough judge on Pop Idol, The X Factor, Britain’s Got Talent, and  American Idol is now appearing in peta2’s brand-spankin’-new ‘Too Hot for Spot’ public service announcement (PSA) to help spread the word that a hot car is no place for your cool canine companion. A self-professed animal lover, Simon was on the lookout for dogs in parked cars even before he did the PSA for us, but we’ll let him tell you that story.

It only takes a few minutes for temperatures to rise to dangerous levels inside parked cars, even on mildly warm days with the windows down. To this stat per cid: Parked cars are deathtraps for dogs: On a 78-degree day, the temperature inside a parked car can soar to 100 in just minutes, and on a 90-degree day, the interior temperature can reach as high as 109 degrees in less than 10 minutes. So by the time you pop in and out of the store or restaurant, it may already be too late.

Put yourself in your dog’s shoes … er, um, collar. Would you want to be stuck in a car in the heat? Please, you know you complain when just sitting at a red light because there’s no breeze. So leave your dog in the calm, cool comforts of home—his or her life could depend on it. Oh, and Simon says, “Thank you.”