Number of Americans at risk of flooding to double in 30 years

The number of people in the U.S. who are exposed to flooding will nearly double over the next 30 years, according to a study in the journal Nature Climate Change.

The major driver will not be climate change. Instead, the study says population growth that spurs new development will be the chief cause.

That’s not to say climate change won’t be a factor. In fact, rising sea levels and stronger hurricanes fueled by climate change will put 700,000 more people at risk of flooding by 2050. Most of the areas facing new flood risk due to population growth will be in places that don’t have much exposure to flooding right now, largely in the interior of the country from Arkansas to Kansas to Idaho.