Both a hurricane surge during high tide and a tsunami can be extremely hazardous to the coast, but there are some differences in terms of the conditions that make them more destructive.
A hurricane surge occurs when a large volume of ocean water is pushed onto shore by a hurricane or tropical storm. The severity of the surge depends on the strength of the storm and the geography of the coastline. If a hurricane surge occurs during high tide, it can lead to a much higher water level than if it occurred during low tide. This can lead to more flooding and more damage to coastal structures.
On the other hand, a tsunami is a series of ocean waves caused by an underwater earthquake, landslide, or other event. Tsunamis can be incredibly destructive because they can travel across entire ocean basins and can retain their energy as they approach shore. The severity of the tsunami depends on the size of the earthquake or event that caused it, the distance from the event to the coast, and the geography of the coastline. In general, a tsunami can be much more powerful and destructive than a hurricane surge.
Therefore, both a hurricane surge during high tide and a tsunami can be hazardous to the coast, but a tsunami can be more destructive due to its potential for greater power and reach.