In this study, we look at how increased sea-level rise (SLR) could change tsunami hazards in California, particularly as more people live, work, and visit the coast. The research focuses on four levels of tsunami risk (with annual return periods of 100-, 475-, 975-, and 2475-years) and how SLR affects coastal flooding, strong currents, erosion, and damage to ports and communities. Using a special simulation tool, we model tsunami waves under four different SLR scenarios (ranging from 0-meter to a 2-meter increase). We then evaluate the potential damage to buildings, the potential economic losses, and the potential casualties using both Esri Business Analyst software and software that mimics the Federal Emergency Management Administration's Tsunami Hazus tsunami risk analysis model. We look at how SLR could impact cultural landmarks, infrastructure, and the engineering of critical and essential buildings in California.