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‘Until now, widespread bleaching had happened only during the warmer El Niño years.’ Bleached coral on the John Brewer reef, Australia, in February 2022. Photograph: Grumpy Turtle Designs/WWF

While all eyes were on another horror, our war against the living world went nuclear. Over the weekend, temperatures at some weather stations in the Arctic rose to 30C above normal. Simultaneously, at certain weather stations in the Antarctic they hit 40C above normal. Two events, albeit off the scale, do not make a trend. But as part of a gathering record of extreme and chaotic weather, these unprecedented, simultaneous anomalies are terrifying.

On their heels came news of another horrific event: mass coral bleaching on the Great Barrier Reef during a La Niña year. La Niña is the cool phase of the Pacific cycle. Until now, widespread bleaching had happened only during the warmer El Niño years. The likely impacts of the next El Niño are too awful to contemplate.