Cracked window but not sure about the cause : HomeImprovement

A few days ago we had a sudden super heavy rainstorm for a few seconds before everything was good again. Today I noticed that one of the windows has a crack on the outer glass.

Does anyone know if this type of crack, inside of the outer glass with no impact damage on the outside of the glass, could be caused by?

  1. Thermal fracturing due to rapidly changing temperatures

  2. Impact damage when a window slams closed due to winds

  3. Outside force (unlikely as I can’t find any impact damage on the outside)

Any help is appreciated as I need to report the damage but want to prepare in case I have to pay it myself for some reason. 😅

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