… How did entire communities find themselves in the midst of raging fires without enough water on hand to fight them? The answers have exposed the weaknesses of Los Angeles’ water systems and prompted widespread calls to redesign Southern California’s water infrastructure. Water managers and experts said the water systems in Pacific Palisades and Altadena were never designed for wildfires that rage through entire neighborhoods, or for infernos intensified by climate change. In fact, their design effectively guaranteed that hydrants would lose pressure and fail during a giant fire. … So far, however, local officials in Los Angeles and L.A. County appear to have taken few, if any, concrete steps toward major changes.