✉news EnvironmentOceans first seen 4 h ago, last 4 h ago, peak #34
Oceans hit record heat in 2025, scientists warn
Original: 12 Hiroshima bombs every second?: Oceans hit record heat in 2025, scientists warn. Here’s what it means for the planet
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.
Why now: New measurements showing unprecedented ocean warming in 2025 highlight the accelerating pace of climate change.
Evidence
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