By JUSTIN GILLIS

Flooding of Coast, Caused by Global Warming, Has Already Begun

Scientists’ warnings that the rise of the sea would eventually imperil the United States’ coastline are no longer theoretical.

By JUSTIN GILLIS

NORFOLK, Va. — Huge vertical rulers are sprouting beside low spots in the streets here, so people can judge if the tidal floods that increasingly inundate their roads are too deep to drive through.

Five hundred miles down the Atlantic Coast, the only road to Tybee Island, Ga., is disappearing beneath the sea several times a year, cutting the town off from the mainland. Read more.