Coral Reefs worldwide have been showing signs of bleaching — losing their color due to warmer ocean temperatures. Computer forecasts suggest that corals in the Caribbean may undergo drastic bleaching in the next few weeks, and many may die.

The New York Times reports that, “What is unfolding this year is only the second known global bleaching of coral reefs. Scientists are holding out hope that this year will not be as bad, over all, as 1998, the hottest year in the historical record, when an estimated 16 percent of the world’s shallow-water reefs died. But in some places, including Thailand, the situation is looking worse than in 1998.”

The NRDC has an appeal by Sigourney Weaver which you can read here: Coral Reefs.