This scares me every summer. If she got in the car, wouldn't she have open it if she got to hot? This is really heartbreaking. My daughter is almost 4, and I've always been worried about this. My kids are not allowed to play outside alone. I feel, not in this case since we don't know what happen, but people in general need to watch there kids outside.
I took my kids and dog down the road to a neighbors. When we got home, the dog came out with me, but must have jumped back in while my son got out. Within 30 minutes I started thinking I left her outside. She never runs away. I looked all over, and guess what I went to my car to drive around and there she was. I am so thankful that in Maine it was not in the 80's yet, and my car was still under shade. She did not even feel hot when she got out. I was so lucky, but felt so bad.