Coral reefs around the world have been subjected to unprecedented heat stress since early 2023. A new report finds heat-related coral bleaching has damaged corals in more than 80 countries, making it the most extensive bleaching event ever recorded, with no clear end in sight. Between January 2023 and April 2025, heat stress impacted 84% […]

Coral reefs around the world have been subjected to unprecedented heat stress since early 2023. A new report finds heat-related coral bleaching has damaged corals in more than 80 countries, making it the most extensive bleaching event ever recorded, with no clear end in sight.

Between January 2023 and April 2025, heat stress impacted 84% of coral reefs worldwide, from the Mesoamerican Reef in the Caribbean to so-called supercorals in the Red Sea, an area previously believed to be resilient to damage caused by extreme temperatures.

archived article (Wayback Machine)

report cited (Wayback Machine)