It's EXTREMELY dangerous to leave a dog shut in a car in the summer. But sometimes you need to stop for groceries or something and you've got the dog with you and can't take him (or her) into the store.
You've had the air conditioning on, and the car is reasonably cool. So you leave the windows open, and the sunroof, and scuttle in. But if you get distracted (maybe the sales assistant is exceptionally stupid) you may not realise how much time has elapsed.
Have a thermometer in the car with a radio transmitter. Have a receiver in the keyfob you use for the central locking/alarm/. When the temperature in the car reaches a dangerous level (30 Centigrade ?), the alarm goes off and you get a PeepPeepPeep to remind you to go and check on the doggie .....
These things should be compulsory. 5 minutes after the beeper goes off, the car itself starts to squauk, and the doors automatically unlock so that bystanders can open it up and let the dog out. If they steal your stuff and your car, good. You deserve it, you b@st@rd.-- 8th of 7, Jun 21 2002 a) leave the windows open. b) do not leave dog in car.-- DrCurry, Jun 22 2002 8th of 7 did say that in this case the windows have been left open-- kaz, Jun 22 2002 Croissant particularly for the automatic unlocking. Cars with motorized doors could actually open them as the next step.-- wiml, Jun 22 2002 random, halfbakery