The term for the gradual rise in sea levels along the Pacific Coast is sea level rise.

Sea level rise refers to the gradual increase in ocean levels along coastlines, including the Pacific Coast, due to climate change. Two primary factors contribute to this phenomenon: the melting of glaciers and polar ice caps and the thermal expansion of seawater as it warms. As global temperatures rise, more ice melts, and water expands, leading to higher sea levels. This rise in sea levels threatens coastal communities, ecosystems, and infrastructure, causing increased flooding, erosion, and damage to habitats, and highlighting the urgent need for climate action and adaptation measures.