Did you know that a volcanic eruption can affect the entire world? When the Hunga Tonga-Hunga Ha’apai volcano erupted on January 15, 2022, it affected the ocean everywhere. That’s because it created an atmospheric wave that disturbed the ocean. It also generated a tsunami. We analyzed weather station and tidal gauge data to learn more about the effects of the Hunga Tonga-Hunga Ha’apai volcanic eruption on Mexico. We learned that the atmospheric wave moved across the world many times. We also learned that the tsunami reached heights of up to 2 meters (6.5 feet) along the Pacific coast of Mexico. Our analysis of the tsunami warning system in Mexico showed that most people were not informed to stay away from the ocean. Based on our analysis, we recommend making changes to tsunami warning systems.