The threat of sea-level rise stretches well beyond the coastline. Higher seas are pushing into the source of our drinking water . They could increase the cost of insurance across the region, and local governments trying to fund resiliency projects may deal with higher taxes and fees. South Florida residents are trying to catch up, too. Mary Jo Aagerstoun of West Palm Beach says sea-level rise wasn’t on her radar until 2013. “My grandchildren, who are going off to college, are facing a dying