Experts with the Motor Industry Research Association said warmer weather causes chips to spread into vertical cracks. Our experts recommend repairing chips or cracks as soon as possible especially during long heat waves. ... So, we verified yes, if your windshield is chipped or crack, heat can cause more damage.

Do windshield cracks get worse in heat?

The sun and heat can both cause your glass to heat up and expand, which can cause the crack or chip to rapidly spread. If this happens, the crack or chip can become too large to repair and your entire windshield will need to be replaced.

How do you stop a crack in your windshield from spreading?