Oscillating currents produced by tides are known as tidal streams. Tidal power is taken from the Earth's oceanic tides. Convection created by tides and sea currents enhance this change. This results in elevated sea levels called ocean tides. All these materials move back and forth under the influence of waves, tides and currents. The tides and currents in the area are not severe. Seawater penetrates these elevated areas only during storms with high tides. Mudflats are coastal wetlands that form when mud is deposited by tides or rivers. In 2017, beach erosion worsened with high-energy king tides and elevated sea levels. Such waves are called "internal tides". This atmospheric instability makes weather forecasting less predictable than tides or eclipses. Movement is generally created by tides and wind. These were are influenced by floods and high tides. They tend to spawn in the intertidal zone at spring high tides. Demarcation lines can further vary due to tides and weather.