The intensifying marine heatwaves pose significant risks to marine ecosystems along the U.S. West Coast. Top predators, such as humpback whales and sea lions, are particularly vulnerable to domoic acid poisoning, which can cause neurological damage and death. Seabirds, including Common Murres, face starvation due to reduced prey availability, while nursing sea lion pups risk malnutrition as mothers struggle to find food. Historical data from the 2014-2016 heatwave revealed catastrophic impacts, including the largest seabird die-off ever recorded, with an estimated 4 million Common Murres lost. Additionally, warming waters may compress whale populations closer to shore, increasing the likelihood of ship strikes and fishing gear entanglements.