Cracked Windshield on my KIA Seltos.

We are not sure where the impact on the windshield was but during our 6 hour trip on a hot sunny 104F degree day, the three cracks grew into about an inch from the impact point. Then we hit a downpour (monsoon season here), towards the end of our trip, which quickly brought the temperature from 104 to 86 degrees! When the skies cleared, that's when we noticed the cracks grew to more than 6 inches on all three directions of the crack. I reviewed the video footage from my dash camera and the sudden change in temperature really made the cracks grew longer.