Heading to work on hwy 140, there is no trees nothing that could fall on my car the nearest car was at least half a mile away, it's 30something degrees outside and as my driving I heard a loud boom I opened up the cover to my sunroof and it was shattered, there's nothing that could have landed on it the glass was pointing upwards like it exploded out. That stretch of road I was on has nothing around that could cause that and if it had been a rock it would have hit either the front of my car or my windshield and neither were hit or anything of that nature. The only conclusion I have is that it was the temperature difference.

- Merced, CA, USA