Texas summers cook shingles with 100-plus degree heat, causing them to crack...

https://www.scribd.com/document/1013566234/Case-Study-When-Hail-Breaks-the-Shingle-Mat-and-Standing-Water-Finishes-the-Job-A-Texas-Roof-Story-210615

Texas summers cook shingles with 100-plus degree heat, causing them to crack and curl faster than you'd think. Winters might seem mild but when we get those rare freezes the temperature swings cause shingles to become brittle and break