By Zoila Palma: A rare combination of an immense Pacific Ocean marine heatwave and a strengthening “super El Niño” is expected to significantly influence weather patterns and marine ecosystems across the United States and parts of Canada this autumn and winter.
The marine heatwave, which developed in May 2025 in the northeastern Pacific, has pushed ocean surface temperatures as much as 3–4°C (5.4–7.2°F) above average.
NOAA research oceanographer Andrew Leising described the warming area as exceptionally large, while scientists say the developing El Niño farther south is expected to further intensify Pacific Ocean temperatures.
Along the U.S. West Coast, particularly California, warmer coastal waters are raising concerns about higher sea levels, storm surges and flooding. Researchers expect sea levels during the peak of the El Niño season to reach 15–30cm (5.9–11.8 inches) above normal, while warmer ocean waters could fuel increased atmospheric rivers, bringing heavier rainfall, inland flooding and mudslides.
The Pacific Northwest and western Canada could face reduced snowfall and worsening drought conditions as warmer temperatures shift precipitation from snow to rain at higher elevations.
Drier and warmer conditions are also expected to increase wildfire risks across areas including northern California, eastern Oregon, southern Idaho and Utah, potentially affecting air quality and causing significant economic losses.
El Niño could also influence tropical storm activity, suppressing hurricane development in the Atlantic while strengthening storms in the eastern Pacific, increasing risks for Mexico.
However, stronger Pacific storms could help weaken marine heatwaves by cooling ocean waters through evaporation and wind-driven mixing.
Marine ecosystems are expected to face some of the most serious consequences.
Warmer waters can reduce nutrient availability and oxygen levels, forcing fish and other marine species to move or die. Scientists warn that prolonged exposure could disrupt fisheries and harm salmon, marine mammals and seabirds. Researchers say the growing frequency of major marine heatwaves is closely linked to long-term ocean warming driven by climate change.
The post International News: Rare Pacific heatwave and super El Niño could bring major weather and marine impacts appeared first on Belize News and Opinion on www.breakingbelizenews.com.
By Zoila Palma: A rare combination of an immense Pacific Ocean marine heatwave and a strengthening “super El Niño” is expected to significantly influence weather patterns and marine ecosystems across the United States and parts of Canada this autumn and winter. The marine heatwave, which developed in May 2025 in the northeastern Pacific, has pushed
The post International News: Rare Pacific heatwave and super El Niño could bring major weather and marine impacts appeared first on Belize News and Opinion on www.breakingbelizenews.com.