Every month, we receive questions and concerns related to flooding, government regulations and sea-level rise. We read every single one. This week, we received questions about mean lower low water — ...

Sea levels along the United States coast are rising faster than they did in the past, and the change is not subtle.

The world’s ice sheets are on course for runaway melting, leading to multiple feet of sea level rise and “catastrophic” migration away from coastlines, even if the world pulls off the miraculous and ...

Height above mean sea level is only one of at least three measures of height. Two others are the height above a perfect ellipsoid that approximates the shape of Earth, and the height above an ...