Islais Creek is an unassuming waterway along San Francisco’s eastern industrial shoreline, meandering its way inland and providing a natural border between The City’s Bayview and Dogpatch neighborhoods. There’s a nice little park there, tucked under a bridge, that locals visit. But it’s not the kind of place most people think about much. Environmentalists and urban planners, on the other hand, think about it a lot. Here’s why: Rising sea levels and flooding.