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

https://paxtoniktt237.novacrestiq.com/posts/hot-mop-roofs-in-san-diego-a-time-tested-low-slope-option-3

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.