Washington, D.C.

By the year 2030, there is a 1 in 6 chance waters will rise above the 10-foot mark at Washington, D.C.'s nearest flood risk indicator site at the Potomac River, according to Surging Seas.

Below the 10-foot rise mark in Washington, D.C., there are 6,070 people, 2,656 homes, and 2,549 acres of land.