Bleach

Conservationists warn that the current super El Niño is pushing ocean temperatures to levels that could trigger mass coral bleaching and death on reefs worldwide. Rising heat stress is described as an existential threat to coral ecosystems, which support vast marine biodiversity and coastal livelihoods. Environmental groups are urging attention to the accelerating damage as sea surface temperatures break records.

Greenpeace says the world's oceans last year absorbed heat equivalent to almost 40 times all energy used by humanity. The group also cites figures that 84% of global coral reefs have been hit by bleaching-level heat stress, blaming fossil fuel companies and industrial meat and dairy production for driving ocean warming, and is calling for action to protect the seas.

A record-strength El Niño has pushed Pacific Ocean temperatures to unprecedented levels in 2026, according to reports circulating widely online. The event is being linked to intensified storms, coral bleaching risks and unusual weather patterns across Asia, the Americas and Australia. Commenters are debating whether the episode signals a new benchmark for climate extremes, with many calling for closer monitoring of ocean temperatures and stronger preparedness measures in vulnerable coastal regions.

The world's oceans absorbed a record 23 zettajoules of heat last year, the highest annual figure ever measured, according to reporting by The Guardian. The finding underlines the scale of global warming, since the seas take up the vast majority of excess heat trapped by greenhouse gases. Scientists say rising ocean temperatures drive sea level rise, coral bleaching and more extreme weather.

A piece by student intern Arya Adhye examines the disappearance of the Great Barrier Reef, arguing that Australia's iconic coral system is vanishing at an alarming rate. The article, published by the Sierra Club, frames the reef's decline as a worsening environmental crisis tied to ocean warming, adding to a growing body of concern about the fate of the world's largest coral reef.

A new report covered by Mongabay finds that coral reefs worldwide are getting less time to recover between bleaching events as ocean temperatures keep rising. The findings suggest increasingly frequent marine heatwaves are eroding reefs' ability to bounce back, adding urgency to warnings about climate change's impact on marine ecosystems.

New analysis shows the world's oceans absorbed a record amount of heat in 2025, equivalent to roughly 23 zettajoules, or about 40 times humanity's total annual energy use. Scientists say the finding confirms oceans are absorbing the vast majority of excess heat trapped by greenhouse gases, with rising water temperatures driving sea level rise, coral bleaching and more intense storms.

Scientists report that the world's oceans reached their highest recorded temperatures in 2025, with warming likened to the energy of a dozen Hiroshima bombs released every second. The record heat is raising alarm about coral bleaching, stronger storms, sea-level rise and disruption to marine ecosystems, with researchers urging faster cuts to greenhouse gas emissions.