Concerned that rising waves will flood runways and buildings in the coming years, officials at San Francisco International Airport are moving ahead with a $587 million plan to build a major new sea wall around the entire airport. The plan, the latest example of the growing cost of climate change in California, involves driving steel pilings - sheets with interlocking edges - into the mud and also constructing concrete walls in some places around all of the airport’s 10-mile perimeter. “This is something we’ve been looking at for many years,” said Doug Yakel, a spokesman for the airport. “What’s changed...