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California Heat Wave Kills Hundreds of Seabirds, Rescue Strained

7/2/2026

Summary

Marine Heatwave Kills

Marine heat wave along California coast this spring has caused widespread seabird starvation and deaths.
Warmer surface water narrowed the nutrient-rich near-shore zone, pushing anchovies, sardines and krill deeper and leaving common murres and brown pelicans dead or emaciated.
SeaWorld’s Animal Rescue Center in San Diego and other facilities have treated hundreds of birds, straining capacity, while a June-formed El Niño may intensify the heat wave and keep mortality under monitoring.

Summary

Scripps Records Heat

Scripps measured ocean temperatures at coastal stations, with three stations breaking records for 40 days this year.
Dan Rudnick’s robotic gliders logged temperature anomalies comparable to the 2023 El Niño and persist into 2027.
The U.S. Fish and Wildlife Service has not released a report on seabird mortality.
A 2024 Science study linked the 2013 “blob” mass from Alaska to Baja to a loss of over 50 % of Alaska’s 4 million murres.

Summary

Heatwave Ravages

NOAA confirmed in June that an El Niño pattern has formed and will reach historic strength.
Warm-water conditions are enabling invasive sea urchins to clear-cut giant kelp forests, destroying essential coastal habitat.
The Pacific heat wave is shifting jet streams, producing atmospheric rivers over California and drought across Southeast Asia and southern Africa.
Marine mammal strandings are rising, with sea lion pups and dolphin calves starving along the North American coastline.

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Marine Heatwave Kills

Marine heat wave along California coast this spring has caused widespread seabird starvation and deaths.
Warmer surface water narrowed the nutrient-rich near-shore zone, pushing anchovies, sardines and krill deeper and leaving common murres and brown pelicans dead or emaciated.
SeaWorld’s Animal Rescue Center in San Diego and other facilities have treated hundreds of birds, straining capacity, while a June-formed El Niño may intensify the heat wave and keep mortality under monitoring.

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