With regard to rising sea levels, the latest sober science (2023) establishes that the global sea level is rising about 1 inch every 8 years.
This is from
NOAA (US National Oceanic and Atmospheric Administration). NOAA is responsible for the lives of millions of people, in the context of hurricanes and so on. It must neither underestimate the risk to life, nor indulge exaggerations that disrupt the livelihood of millions.
This amount of rising sea level is concerning because of regional complications, such as lack of drainage whence storm floods.
However, 1 inch per 8 years is a far cry from the very many alarmist predictions about rising sea levels made in previous years that have now been demonstrated to be false.