If this message saves just one more life, it bears repeating: the heat generated inside of parked cars can be deadly to our pets. And this doesn’t just apply to hot summer days.

A recent study showed just how quickly the inside temperature of a car can rise, even when the outside environment was only 72 degrees. Within 10 minutes, the car’s interior temperature increases by almost 20 degrees; within 30 minutes, that number can nearly double. Don’t think cracking a window will cool things down, because it doesn’t help. Even the usual cooling method pets rely on, panting, doesn’t occur when pets are in oppressive heat.

In spite of the best emergency treatment available today, many pets suffering from heatstroke don’t survive.

So if you have to go out on a warm day, show some love and leave your pet at home.