The anticipated El Niño and marine heatwave could severely impact marine ecosystems along the California coast, particularly affecting young sea lions and other marine mammals. Reduced food availability due to disrupted upwelling may lead to mass strandings of malnourished pups, as seen in previous similar events. Northern California is also experiencing an increase in domoic acid poisoning cases among sea lions, which could worsen in the coming months. These conditions pose significant challenges for wildlife rehabilitation centers, requiring extensive resources to care for affected animals (Los Angeles Times, 2026-09-08).