A Tsunami is a series of giant waves caused by large disturbances in the ocean, such as: earthquakes, underwater volcanic eruptions, and underwater landslides. When these Tsunamis reach shallow water near the coast, they can increase in height and cause a ton of damage to coastal communities.

How do Tsunamis form? Well Tsunamis form due to the displacement of a large volume of water, caused mainly by earthquakes, underwater volcanic eruptions, or meteorites hitting the ocean. When the ocean floor suddenly moves, it creates some powerful ocean waves with long wavelengths that travel across the ocean, gaining energy and height as they move closer to the shore. When these waves reach shallow water near the coast, the energy is concentrated and the wave height increases, creating a tsunami that can cause widespread damage and flooding.

Mega-tsunamis are rare and extremely strong ocean waves that can cause tons destruction. They are an upgraded level of Tsunamis, and they are characterized by wave heights that can reach hundreds of meters. Much taller than normal tsunamis. Mega-tsunamis are typically caused by large underwater landslides or the collapse of volcanic islands into the ocean. They can also be triggered by meteorite impacts, although this is much less common than underwater landslides or volcanic islands collapsing into the ocean.

Surviving a tsunami requires quick action and preparation. These steps can help you survive a Tsunami/Mega-Tsunami:

1. Evacuate immediately: If you are near the coast and a tsunami warning has been issued, evacuate to higher ground as quickly as possible. Do not wait for official evacuation orders.
2. Move inland: Move as far inland as possible, at least a few miles from the coast. Stay away from low-lying areas and river mouths that can channel the tsunami inland.
3. Climb to high ground: Climb to high ground, such as a hill or a tall building. Stay away from bridges, overpasses, and other structures that can collapse during the tsunami.
4. Avoid driving: Do not attempt to drive during a tsunami. Heavy traffic and road closures can slow down your evacuation and increase your risk of being caught in the tsunami.
5. Stay informed: Stay informed about the situation by listening to local news and following the instructions of emergency personnel.
6. Take shelter: If you are unable to evacuate or reach high ground, find a sturdy building or take shelter in a closet or bathroom. Stay away from windows and doors, and brace yourself against a wall or furniture.

Remember that a tsunami can consist of many waves, so stay in a safe area until the threat has passed.

If you are in the water and a tsunami is coming, your first priority should be to try to reach higher ground as quickly as possible. But if this is not possible, there are a few ways/strategies that can increase your chances of surviving the tsunami:

1. Swim parallel to the shore: If you are in the water and a tsunami is coming, swim to a shore that is away from the tsunami. This can help you avoid being caught in the current and pulled out to sea.
2. Hold onto something floating: If you cannot swim, try to find something floating that you can hold onto, such as a piece of debris or a life jacket. This can help you stay afloat and reduce your risk of drowning. (Note: Things that float are better to climb/hold on to.)
3. Climb onto higher ground: If you can, try to find a rock, reef, or other tall structure that you can climb onto. Stay as high above the water as you can and brace yourself for the impact of the tsunami.
4. Hold your breath: When the tsunami reaches you, hold your breath and use something to try to protect your head and neck as much as possible. This can reduce the risk of injury and drowning.

Remember, tsunamis can be unpredictable and can travel great distances. It is important to evacuate to higher ground if possible, and to avoid going into the water when a tsunami warning has been issued.