Texas roofs take a real beating from the summer heat. When it hits 100 degrees...
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 roofs take a real beating from the summer heat. When it hits 100 degrees or more, shingles can crack and curl, letting water sneak underneath