Torch-down roofs in San Diego are used on low-slope areas

https://louiswjgh753.brightsora.com/posts/tile-and-low-slope-roof-systems-in-san-diego-what-the-code-framework-emphasizes

Torch-down roofs in San Diego are used on low-slope areas, where reroofing rules allow exceptions to typical slope limits when the roof still provides positive drainage.