The largest tsunami in history is one of the deadliest and most destructive natural phenomena. In this article, we will discuss some of the largest tsunamis on record, their causes, and how to increase awareness and prepare for these disasters. One of the most devastating tsunamis occurred on December 26, 2004, known as the Indian Ocean Tsunami. This tsunami was triggered by an earthquake measuring 9.1 to 9.3 on the Richter scale which occurred off the coast of Sumatra, Indonesia. Tsunami waves hit the surrounding islands, claiming more than 230,000 lives in 14 countries. The consequences of this disaster were not only loss of life, but also material losses reaching billions of dollars. Furthermore, the TÅhoku Tsunami that hit Japan on March 11, 2011 emerged as one of the most famous tsunamis in modern history. This tsunami was generated by a magnitude 9.0 earthquake off the coast of Sendai. Waves as high as 40 meters hit the coast, destroying cities and causing a nuclear meltdown at the Fukushima Nuclear Power Plant. More than 15,000 people died, and economic losses were estimated at 235 billion dollars. Apart from that, another tsunami worth noting is the Lisbon Tsunami in 1755. This 8.5 magnitude earthquake rocked Portugal and produced devastating waves, causing the deaths of more than 60,000 people. This tsunami not only damaged the city of Lisbon but also changed the world’s view of the power of nature. Tsunamis can also be triggered by volcanic lava, as happened with the eruption of Mount Krakatoa in Indonesia in 1883. The eruption caused tsunami waves that destroyed several islands around the Sunda Strait, resulting in the deaths of around 36,000 people. It is important to realize that tsunamis are not always generated by earthquakes. Other factors such as underwater landslides and volcanic activity can trigger tsunamis. Therefore, to protect yourself and your loved ones, it is important to have a plan and know about the early signs of a tsunami, which could include a preemptive earthquake, a retreat of sea water, or a high-pitched roar. Building an effective early warning system is an important step in mitigating tsunami disasters. Countries in tsunami-prone areas need to strengthen infrastructure and improve public education about the risks. Regular training and simulations can help improve preparedness. The devastating tsunami event brought an important lesson: we must respect the forces of nature while taking proactive steps to minimize risks. Ongoing scientific research into tsunami patterns and advanced monitoring technology can provide a better picture of possible future threats. Communities living in coastal areas should pay attention to local guidance and participate in preparedness initiatives. In this way, we can increase disaster resilience and contribute to community safety.