El Niño is back, and ocean temperatures are already near record highs—that can spell disaster for fish and corals

It's official: El Niño is back. By late fall 2026, forecast models give a 2-in-3 chance of a strong-to-very-strong El Niño affecting the weather, climate and ocean temperatures across the planet.

This report comes from Phys.org. The story centres on El Niño is back, and ocean temperatures are already near record highs—that can spell disaster for fish and corals. Full coverage and background context is available at the original source. Readers seeking more detail on this developing topic are encouraged to follow updates from Phys.org and related outlets covering this beat.