From NPR.

According to a new study looking at how sea levels are measured, global sea levels could rise more than expected because of climate change.

As the climate gets hotter, oceans are rising — that’s because polar ice and glaciers are melting, and the water itself expands as it gets warmer.

A new study from Wageningen University & Research, in the Netherlands, finds that scientists may be underestimating how much sea levels could rise.

The researchers found the computer models use a sea level that’s about 10 inches too low, on average. If corrected, those same models would show as many as 130 million more people may be affected if the sea level rises by 3 feet.