Millions more people are in the path of rising seas than previously thought

Rising sea levels are already affecting coastal communities, exacerbating high tide events like this "king tide" in Mill Valley, Calif. A new study shows researchers may be underestimating how many people will be affected globally.

Oceans are rising as the climate changes, threatening coastal cities. A new study shows that much more of the world's population is vulnerable than earlier predictions had estimated.

(Image credit: Josh Edelson)