I don't remember seeing this story in the Dog News section, but forgive me if it was and I missed it:
http://www.sgvtribune.com/ci_9627753
When I heard this story on the local news, (6/18/08 BEFORE the heat wave) I am pretty sure they said the temperature was in the high 80s outside but the temperature in the car was 125F. They also reported people said they saw the dog frantically struggling to escape the car. I wish one of those people had thought to break a window.