As record heat risks bleaching 73% of the world's coral reefs, scientists ask 'what do we do now?'

A vast array of solutions are being worked on but experts urge a 'fundamental rethink' as temperatures are forecast to climb even higher in coming decadesFollow our Australia news live blog for latest updatesGet our morning and afternoon news emails, free app or daily news podcastAfter 18 months of record-breaking ocean temperatures, the planet's reefs are in the middle of the most widespread heat-stress event on record.Across the Pacific, Atlantic and Indian oceans, latest figures from the US government's Coral Reef Watch, shared with the Guardian, show 73% of the world's corals have been hit with enough heat for them to begin bleaching.Sign up for Guardian Australia's free morning and afternoon email newsletters for your daily news roundup Continue reading...