Temporary ups and downs in sea level have always happened. These come from things like regular daily tides, and natural year-to-year fluctuations such as El Niño. The rises and falls can also potentially be very big from passing storms. In the past, most of these regular ups and downs have not caused problems or led to flooding. Now with sea level rise, the temporary increases are leading to more frequent and more severe flooding. This will continue to worsen in the future as sea level rise continues.
