Sea levels around the United States will rise up to a foot over the next 30 years due to climate change, as much as they have risen in the previous century, the National Oceanic and Atmospheric Administration (NOAA) projected in a report on Tuesday.

The study forecasts that sea levels along the US shoreline will rise 10-12 inches (25-30cm) on average by 2050. Sea levels will tend to be higher along the Atlantic and Gulf shores, because of greater land subsidence there, than along the Pacific coasts.