Two-thirds of world's coral reefs bleaching due to heat stress

Approximately two-thirds of the world's coral reefs are experiencing bleaching due to severe heat stress, as reported by NOAA. This threatens marine biodiversity and coastal economies. The 2014-2017 event was severe, but 2023-24 could surpass it. Recent assessments show alarming coral mortality, with up to 93% bleaching in some areas. The Atlantic Ocean is particularly affected, with nearly 100% of its reefs experiencing bleaching-level heat stress.