Marine heat waves are intensifying globally, with unprecedented temperatures affecting over 80% of ocean surfaces during the first half of the year. This climate phenomenon poses significant threats to San Francisco's coastal ecosystems, marine biodiversity, and local fishing industries. Scientists warn that rising ocean temperatures accelerate coral bleaching, disrupt fish migration patterns, and destabilize entire food chains. The crisis demands urgent action from policymakers and communities to mitigate greenhouse gas emissions and adapt to rapidly changing marine environments.

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