‘It’s not natural for them to cooperate’

of curving streets and cul-de-sacs, edges up to California’s San Francisco Bay. Built on wetlands that were drained and filled more than a century ago, the city was barely above sea level to begin with. Today, 34,000 people live in Foster City, and all that keeps water from pouring into their streets and neighborhoods is an earthen levee fortified by concrete and riprap. With climate change raising the sea level, this won’t be enough to protect