This coverage is made possible through a partnership between Grist and WABE, Atlanta’s NPR station. Just across the road from the waterfront in Brunswick, Semona Holmes lives in a house surrounded by fruit trees, potted flowers, a fish pond, and — when it rains or the tide is extra high — floodwater. “If you can imagine this entire area here completely flooded,” she explained on her front porch on a recent afternoon. “The flooding would be — w…